Reconcile first, file second. Download the GSTR-2B for the exact tax period, match every purchase document to your books, investigate missing, duplicate, amended and credit-note entries, review any Input Tax Credit (ITC) eligibility limits, complete required actions in the Invoice Management System (IMS), recompute the statement when an action changes it, and only then enter eligible ITC and reversals in GSTR-3B. GSTR-2B is an important control report, not a substitute for your purchase register or a complete legal opinion on whether credit may be claimed.
The GST Portal describes GSTR-2B as a read-only, static, auto-drafted statement and advises taxpayers to reconcile it with their own records and books of account. The practical objective is to make one defensible decision for each document: claim, defer, reject, reverse, pay under reverse charge, or obtain a correction from the supplier.
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What GSTR-2B shows—and what it does not
GSTR-2B is generated for a registered person from information reported by suppliers in GSTR-1 or GSTR-1A and GSTR-5, Input Service Distributor information in GSTR-6, and specified import data received from ICEGATE. It is not filed separately by the recipient, and the recipient cannot edit the statement or add an invoice directly to it.
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Presence in GSTR-2B proves only that a record reached the statement under the portal’s data rules. It does not, by itself, prove that the goods or services were received, that the purchase is for business use, that payment conditions have been met, that the credit is within the statutory time limit, or that no other restriction applies. The portal expressly warns taxpayers to self-assess other legal restrictions and reverse credit where required.
Choose the correct period before downloading
Invoice date alone does not determine the GSTR-2B period. The supplier’s filing date and the applicable cut-off window determine when a document is picked up. A late-filed invoice can therefore appear in a later statement than the date shown on the invoice.
| Recipient type | Statement generation described by the GST Portal | Operational implication |
|---|---|---|
| Monthly filer | GSTR-2B is generated on the 14th of the succeeding month. | Use the statement for the month you are preparing, but check which supplier filings fell inside that period’s cut-off. |
| Quarterly filer | The quarter statement is generated on the 14th of the month after the quarter. | Do not expect a normal monthly GSTR-2B for each of the first two months; confirm the current quarterly workflow in the portal. |
| Monthly supplier filings | The FAQ describes a window from the 12th of the relevant month through the 11th of the succeeding month. | A supplier filing just after the cut-off may move the document to the next statement. |
| Quarterly filings and the stated GSTR-5/GSTR-6 window | The FAQ describes a window from the 14th through the 13th. | Check the current portal advisory for the target tax period because cut-off instructions can change. |
Save the downloaded file and the date on which you retrieved it. If your team later changes an IMS action, keep the earlier draft and the recomputed version so the change can be explained.
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Download GSTR-2B from the GST Portal
- Sign in to the GST Portal with the taxpayer account that has access to returns.
- Open Services > Returns > Returns Dashboard > File Returns.
- Select the financial year, return period and applicable filing frequency.
- Open the GSTR 2B tile after the statement is generated.
- View the statement online or download it in Excel or JSON format. Retain the original download in the month’s workpaper folder.
- If the account has more than 1,000 documents across the tables, use the portal’s advanced search or download the entire file. The FAQ says individual table-wise Excel downloads are available when the total across tables is up to 1,000 documents.
For a controlled close, also save the portal summary, the purchase-register extract used for matching, and a note identifying who downloaded the file and when. These records make it possible to reproduce the numbers if the portal later updates a view.
Prepare the purchase register and matching keys
Export the purchase register for the same tax period and include invoices that may have been reported later. A document-level match is more reliable than comparing only monthly totals. Use a consistent format for invoice numbers—for example, remove accidental spaces without changing meaningful characters—and keep the original number in a separate field for review.
| Field to compare | Why it matters |
|---|---|
| Supplier GSTIN | Distinguishes suppliers with similar names and identifies a wrong-GSTIN posting. |
| Invoice, debit-note or credit-note number | Provides the primary document key and exposes duplicates. |
| Document date | Helps identify amendments, period shifts and records posted to the wrong month. |
| Document type | Separates an original invoice from a debit note, credit note, import record or amendment. |
| Taxable value | Reveals value differences, partial credits and rounding or data-entry errors. |
| IGST, CGST and SGST/UTGST amounts | Allows the tax-head totals to be checked independently rather than relying on one combined amount. |
| Place of supply and state details | Helps identify interstate/intrastate inconsistencies and records that may be unavailable under specified portal rules. |
| Books status and payment or receipt evidence | Supports the separate legal-eligibility review; a portal match does not establish these facts. |
Assign each line a status such as matched, book-only, 2B-only, duplicate, amendment, credit note, value difference or eligibility review. Keep the status at document level even when you later summarize amounts.
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A document-level reconciliation sequence
1. Freeze the period and source files
Identify the return period, filing frequency and the version of GSTR-2B being used. Do not mix a draft statement with a later purchase-register export without recording the change. If an IMS action has occurred since generation, plan to recompute before using the final figures.
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2. Match exact records
Start with GSTIN, document number and document type. Then compare date, taxable value and each tax head. An exact match can be cleared only after the business confirms that the underlying purchase is real and that its own accounting and eligibility checks are complete.
3. Reconcile totals after line matching
Once individual rows are classified, total taxable value and each tax head by supplier and by document type. A total that agrees while one invoice is duplicated and another is missing is not a clean reconciliation. Investigate offsetting errors instead of relying on the aggregate.
4. Record an action and owner for every exception
For each unresolved item, note whether the next step is supplier correction, IMS action, deferral, reversal, payment under reverse charge or internal evidence gathering. Set an owner and a due date before the return is submitted. A spreadsheet or accounting system can provide this trail; the GST Portal download alone cannot.
5. Re-run the exception report
After corrections, new supplier filings or IMS decisions, run the matching process again. Close an exception only when the new document or explanation is visible in the records and the amount is reflected in the intended return treatment.
How to handle the main exception types
| Exception | What to check | Typical next action |
|---|---|---|
| Invoice in books but absent from GSTR-2B | Confirm supplier GSTIN, filing status, cut-off timing and whether the supplier used a different document number. | Ask the supplier to report or amend the document. Defer the claim until the business has established that the credit may be claimed under the applicable rules. |
| Record in GSTR-2B but absent from books | Check whether it is a genuine purchase, an employee or another entity’s transaction, an import or an erroneous supplier filing. | Do not claim automatically. Obtain the invoice and receipt evidence, correct the books if the purchase is genuine, or seek supplier amendment and reject or otherwise handle the record as appropriate. |
| Duplicate document | Compare document number, date, GSTIN and tax amounts, including amended versions. | Retain one valid record and prevent a second claim. The GST Portal FAQ states that credit must not be availed twice for any document. |
| Amended invoice | Identify the original document, the amendment reference, changed value or tax and the period in which each appears. | Use the legally correct net position and avoid claiming both the original and the amended amount. Keep the amendment trail. |
| Credit note | Link the note to the original supply and check whether the reduction affects previously claimed ITC. | Reduce or reverse credit as required and ensure the note is not treated as a new purchase. |
| Debit note | Confirm the underlying supply, tax head and whether the note is reported separately. | Match it as a separate document, then assess eligibility and period treatment rather than folding it into the original invoice without evidence. |
| Tax or taxable-value mismatch | Compare the supplier’s filed values with the invoice, goods-receipt records and accounting entry. Check rounding and partial receipts. | Document the difference, request correction if needed, and claim only the amount supported by the applicable rules and records. |
| Negative amount | Look for credit notes, amendments or other reductions that created the negative figure. | Trace the source document and include the required reduction or reversal in the return calculation. |
| Place-of-supply or GSTIN inconsistency | Check registration details, state, supply location and whether the portal has flagged a specified mismatch. | Correct the supplier record where necessary and perform an independent legal review before claiming. |
Because GSTR-2B is read-only, you cannot repair a supplier’s filing by editing your statement. The correction must come through the supplier’s return or through the appropriate portal workflow. Keep written supplier correspondence with the reconciliation file.
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Use IMS carefully, then recompute GSTR-2B
The Invoice Management System allows recipients to act on specified supplier records saved or filed through GSTR-1, GSTR-1A or the Invoice Furnishing Facility. The official workflow provides three actions:
| IMS action | Effect described by the GST Portal | Control point |
|---|---|---|
| Accept | The record becomes part of the relevant available-ITC section and may auto-populate into GSTR-3B. | Accept only after confirming the transaction and eligibility evidence. |
| Reject | The record does not flow as eligible ITC. | Use for an erroneous, duplicate or otherwise unacceptable supplier record; preserve the reason. |
| Pending | The record is excluded while it awaits later action or the applicable time limit. | Use when evidence or a supplier correction is still outstanding, and monitor the next period. |
No action is treated as deemed accepted at draft generation under the FAQ’s description. A recipient may act after draft GSTR-2B generation and before filing GSTR-3B, but the revised advisory says recomputation is mandatory after a post-generation action or change. Recompute the statement and use the revised results; do not manually adjust a draft total and assume it is equivalent.
The system generates statements sequentially only when the preceding period’s GSTR-3B has been filed, according to the advisory. For quarterly filers, the IMS FAQ describes a combined quarterly statement rather than a normal monthly GSTR-2B for the first two months. Confirm the portal’s behavior for the specific period before setting an internal deadline.
Not every inward record appears in IMS. The official FAQ and advisory identify categories that flow directly to GSTR-2B or sit outside IMS, including specified GSTR-5 and GSTR-6 information, ICEGATE import data, reverse-charge items and certain ineligible records. An empty IMS queue therefore does not mean that every purchase has been reconciled.
Perform the separate ITC eligibility review
After matching and IMS processing, review each proposed claim against the underlying transaction and current GST law. The portal’s unavailable display is limited to specified situations, including time-barred credit under section 16(4) of the CGST Act and a particular supplier/place-of-supply mismatch. Other provisions can still make credit unavailable.
- Confirm that the supplier’s document relates to an actual supply received by the registered person.
- Check business use and identify any personal, exempt or non-business component requiring restriction or reversal.
- Review blocked-credit categories and any special rule that applies to the transaction.
- Check the statutory time limit and the period in which the claim is being made.
- Consider payment-related conditions and any required reversal or re-availment process.
- Separate reverse-charge supplies from supplier-reported forward-charge invoices; reverse-charge tax must be paid and the resulting credit treated in the applicable manner.
- Check whether a credit note, return, cancellation or amendment has already reduced the claim.
Keep the eligibility conclusion with the document rather than treating a green or available status in GSTR-2B as approval. Where a rule is uncertain, obtain advice for that transaction and document the conclusion used in the return.
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Translate the reconciliation into GSTR-3B
- Start with the recomputed GSTR-2B and your final exception register, not the first draft downloaded.
- Remove documents that are rejected, pending, duplicated, unsupported or otherwise ineligible.
- Calculate eligible ITC by tax head and by the relevant GSTR-3B category shown for the filing period.
- Enter required reversals in the applicable reversal fields, including reversals arising from credit notes, blocked credit, business-use allocation or other rules.
- Include reverse-charge tax in the liability section and claim any resulting credit only under the conditions and timing that apply.
- Compare the populated values with your approved reconciliation totals. Investigate any difference before filing instead of overwriting it to force agreement.
- Save the filed return acknowledgement, the final calculation and the version of GSTR-2B used.
Return-table labels and portal behavior can be updated. Use the instructions displayed for the target period and the current GST Portal advisory when assigning amounts, especially for unusual supplies, imports and reverse-charge transactions.
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Build an audit-ready workpaper
A useful file lets another reviewer trace a GSTR-3B number back to a document and then to evidence. Retain:
- the original GSTR-2B Excel or JSON download and the recomputed version, if applicable;
- the purchase-register extract and the matching rules or normalization notes;
- the exception list with status, owner, date and resolution;
- supplier emails, corrected invoices and amendment explanations;
- IMS accept, reject or pending decisions and the reason for each non-default action;
- goods-receipt, service-completion, payment and tax documents used for eligibility review;
- the calculation of eligible ITC, reversals and reverse-charge amounts;
- the filed GSTR-3B, acknowledgement and internal approval.
This retention list is a practical control recommendation, not a quotation of a single statutory retention rule. Apply the record-retention requirements that govern your business and transaction.
Choose a matching method that fits your volume
The GST Portal’s Excel and JSON downloads are sufficient for a small register when a reviewer can inspect each exception. Larger businesses may use an accounting or reconciliation system, but software is not mandatory for every taxpayer and no tool removes the need for legal review.
| Approach | Best fit | Capabilities to require | Control risks |
|---|---|---|---|
| Spreadsheet with portal download | Low to moderate volume and limited exceptions | Import Excel, stable document keys, duplicate checks, tax-head comparison, comments and locked final totals | Formula changes, inconsistent formatting and weak access control |
| Internal accounting workflow | Recurring monthly close with purchase records already maintained digitally | Excel/JSON import, supplier master validation, amendment and credit-note links, approval stages and exportable history | Mapping errors during setup and incomplete treatment of records outside IMS |
| Specialist reconciliation system | High volume, many entities or complex exception queues | Document-level matching, rule versioning, user permissions, audit log, recomputation support and data-export controls | Overreliance on automated eligibility flags, integration failures and data-governance exposure |
Evaluate any system on volume and exception complexity, its ability to import the portal files and purchase data, handling of amendments and notes, review-trail quality, exportability, cost and protection of tax data. Ask for a sample reconciliation and verify how it handles records that never enter IMS before relying on it.
Troubleshoot common reconciliation failures
The invoice is in the books but not in GSTR-2B
Check the supplier GSTIN and number first, then ask when the supplier filed and whether the document fell outside the statement cut-off. Search later statements before treating it as permanently missing. Do not duplicate a claim from a manually entered book record while waiting for supplier reporting.
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The GSTR-2B total changed after an IMS decision
Do not edit the calculation to preserve the old amount. Recompute GSTR-2B, download the revised result, update the exception register and rebuild the GSTR-3B figures from that version.
The portal shows available credit but the invoice cannot be located
Investigate the 2B-only record as a possible wrong GSTIN, duplicate, fraud indicator or purchase posted to another unit. Obtain the underlying invoice and receipt evidence; availability alone is not a reason to claim.
The portal shows an unavailable amount
Read the document-level reason and identify whether it is one of the specified categories, such as a section 16(4) time limit or the stated place-of-supply mismatch. Also check for other legal restrictions that the portal may not display.
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Use the full Excel or JSON file or advanced search rather than relying on table-by-table downloads. Split the reconciliation by supplier or document type, but reconcile the subtotals back to the complete statement total.
The previous period’s GSTR-3B is not filed
The advisory says sequential generation can depend on filing the preceding period’s GSTR-3B. Resolve the pending return or portal issue first and confirm the resulting statement before finalizing the next period’s ITC.
Final pre-filing checklist
- Correct financial year, period and filing frequency selected.
- GSTR-2B downloaded and retained in its original format.
- Purchase register covers the intended period and later-reported documents are monitored.
- Every line has a matched or exception status.
- Duplicates, amendments, debit notes, credit notes and negative amounts are traced.
- Supplier corrections are requested where the recipient cannot edit GSTR-2B.
- IMS actions are supported by facts, and GSTR-2B is recomputed after applicable changes.
- Eligibility has been reviewed independently of the portal’s available or unavailable label.
- Reverse-charge tax, blocked credit and other required reversals are included.
- GSTR-3B values agree with the approved reconciliation and tax-head totals.
- Workpapers, approvals and filed-return evidence are saved.
The GST Portal’s core instruction is straightforward: taxpayers should reconcile the data generated in GSTR-2B with their own records and books of account. Treat that reconciliation as a controlled, document-by-document process, then file only the net ITC position supported by both the records and the rules.
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