If the GST department cancelled your registration on its own motion, the usual restoration route is an application in Form GST REG-21. Before applying, confirm the cancellation reason and effective date, clear any return-related filings and dues required in your case, and collect evidence explaining why the default or other problem has been corrected. If the officer approves, the restoration order is issued in REG-22; a proposed rejection uses REG-23, with your response in REG-24.
This process is not a universal undo button. A registration cancelled at the taxpayer’s own request may require a different remedy. Also, the exact filing deadline has changed over time and is not established consistently by the official materials cited here, so verify the current limit and any extension option in the GST Portal and the latest applicable law before submitting.
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First establish what happened to the GSTIN
Do not start by filling REG-21. First reconstruct the registration’s status and timeline. A cancellation that appears to be “inactive” in one screen may have a different effective date in the order, and that date controls which returns and tax periods are affected.
Check the public GST taxpayer record
Use the GST Portal’s Search Taxpayers Using GSTIN/UIN function to review the registration status, registration details, cancellation information and available return-filing history. Public search is useful for confirming the broad timeline, but application-specific notices, filing defects and payment records require signing in to the taxpayer account.
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Retrieve the order and notice
Download the cancellation order and any show-cause notice from the account. Record:
- the GSTIN, legal name and trade name;
- the authority that issued the order;
- the order number and date;
- the effective date of cancellation, including whether it is retrospective;
- the stated reason, such as non-filing of returns, address or registration issues, or another contravention; and
- the response deadline or other directions in the notice.
Keep the original files. A REG-21 application asks for the cancellation order number, date and reason, so relying on memory can produce an incomplete or inconsistent application.
Revocation is different from voluntary cancellation
The rules describe REG-21 for a registration cancelled by the proper officer on the officer’s own motion. That commonly includes an officer-initiated cancellation for return default. It should not be presented as the standard remedy when the taxpayer requested cancellation.
| Situation | What to do first | REG-21 position |
|---|---|---|
| Officer cancelled the registration | Read the order, identify the reason and effective date, and cure the stated problem. | REG-21 is the revocation application route described in the rules, subject to the current time limit and eligibility. |
| Taxpayer requested cancellation | Determine the current registration procedure applicable to the facts and portal status. | Do not assume REG-21 is available; the materials cited here do not establish it as the remedy for a taxpayer-requested cancellation. |
| Registration is suspended or an application is pending rather than cancelled | Follow the notice or pending-application workflow shown in the account. | Revocation is not the same as replying to a suspension or a pending registration query. |
If the order is retrospective, map every affected tax period before making payments or filing returns. A professional GST practitioner or tax adviser is sensible where the order reaches back across multiple financial years, input-tax-credit claims, e-way bills or assessments.
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Clear return defaults and amounts due before applying
For a cancellation based on failure to furnish returns, the key prerequisite is not merely submitting REG-21. CBIC Circular No. 99/18/2019-GST explains that, in the covered situation, returns due up to the cancellation date and the amounts payable under those returns must be furnished and paid before seeking revocation. The rules’ form instructions refer to tax, interest, penalty and late fee payable in respect of the relevant returns.
Build a period-by-period compliance schedule
- List every return that was due through the cancellation date, including the applicable monthly, quarterly or annual form for the taxpayer’s scheme.
- Compare that list with the “filed” and “not filed” status in the portal.
- Calculate tax, interest, late fee and any penalty shown as payable. Separate amounts already paid from amounts still outstanding.
- Check whether a return is blocked by an earlier-period filing, an amendment, a payment mismatch or a notice. Resolve the blocking item rather than repeatedly attempting the same submission.
- Save acknowledgements, challans, ledger entries and filed-return PDFs. These documents support the explanation in REG-21 and help prove that the default was corrected.
Do not claim that a zero-tax return has no compliance consequence: a return can still attract a late fee or be required before a later period can be filed. Conversely, do not pay a figure blindly if the portal ledger, order or a corrected return shows a different liability; reconcile the calculation first.
Account for the cancellation date
Returns due up to the cancellation date are not the same as returns for the period after cancellation. Your schedule should identify the last return actually filed, the period covered by it and the first unfiled period. If the order is retrospective, use the order’s effective date rather than the date you happened to download it.
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Prepare the REG-21 application
REG-21 is an application, not the restoration order. The official form requires the cancelled GSTIN and taxpayer particulars, details of the cancellation order, the reason for cancellation, last-return information, reasons supporting revocation, attachments and verification by an authorised signatory.
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Information and evidence to assemble
- Identity and registration data: GSTIN, legal name, trade name and principal address as shown in the registration record.
- Cancellation details: order number, order date, effective cancellation date and the stated reason.
- Return history: the last return filed, the periods filed after the default was corrected, and acknowledgements or filing references.
- Payment evidence: challans, electronic liability or cash ledger extracts, interest calculations and proof of any late fee or penalty paid.
- Explanation: a chronological account of why the default or other ground arose, what corrective action was taken and how future compliance will be maintained.
- Supporting documents: only those relevant to the stated reason, such as records of a changed authorised signatory, address evidence, technical-outage correspondence or other documents requested in the notice.
Make the explanation specific. “The default was inadvertent” is weaker than identifying the affected periods, the operational cause, the date the records were corrected and the filing or payment references that demonstrate correction. Do not attach unrelated personal or customer data.
Submit through the portal
Sign in to the GST Portal with the authorised credentials, open the registration or services area and select the revocation-of-cancellation application shown for the GSTIN. Complete the fields, upload the supporting files in the permitted formats and sizes, complete verification and submit. Download the acknowledgement and note the application reference number.
A GST Portal functionality compilation published in 2022 reported REG-21 availability for cancellation by a tax official and described Aadhaar authentication or e-KYC conditions for normal taxpayers. Because that is a historical functionality update, confirm the current eligibility, authentication method and signing options displayed in your account before relying on it. The GST Portal’s Cancellation of Registration manual provides the portal’s general workflow.
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Understand the time limit before you submit
Do not use an old 30-day figure automatically. The official portal functionality update located for this procedure describes a 30-day application window and reports an extension to 90 days in its historical account. The CBIC rules compilation amended through 1 January 2022 also describes an original 30-day period that may be extended by specified authorities. Those sources do not establish one reliable, post-amendment deadline as of October 2026.
Check three places on the day you prepare the application:
- the cancellation order and notice, including the effective date;
- the current REG-21 screen, which may display whether the application is available or whether an extension request is required; and
- the latest consolidated CGST Rules, notifications and circulars applicable to your case.
If the portal indicates that the ordinary window has expired, do not submit an inaccurate date or assume that a late application will be accepted. Ask the jurisdictional authority or a qualified GST professional which statutory extension or other remedy is available, and preserve evidence explaining any delay.
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Approval: REG-22
If the proper officer accepts the application, the revocation order is issued in REG-22. Download the order and verify the GSTIN, effective dates and any conditions. A restored registration does not erase the periods during which returns were not filed.
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Proposed rejection: REG-23 and REG-24
If the officer proposes to reject the application, the notice is issued in REG-23. The taxpayer’s response is filed in REG-24. Read the actual notice carefully and answer each objection with a document or explanation where possible.
- Respond within the period stated in the notice; do not substitute an old general deadline from a guide for the deadline printed in your notice.
- Address the exact defect, such as an unpaid amount, an unfiled period, an unsupported explanation or a mismatch in the cancellation details.
- Attach a clean index of evidence and keep the submission acknowledgement.
- Continue monitoring the portal for the final order or additional communication.
A rejection is not corrected by repeatedly filing the same REG-21. Identify whether the issue is curable, whether a reply is still pending, or whether an appeal or other remedy is needed under the current law.
Resume GST filing after restoration
Once REG-22 is issued, map the filing obligations again from the cancellation period through the restoration date. CBIC Circular No. 99/18/2019-GST explains that returns for the period between cancellation and revocation must be furnished after the revocation order within the applicable period. The circular refers to 30 days in its described framework, but that should not be treated as a universal current deadline without checking later amendments and the taxpayer’s facts.
Use a controlled filing sequence
- Confirm that the registration status shows active or restored and that the order is downloadable.
- List every return period falling between the cancellation effective date and the revocation order date.
- Check which return must be filed first in the portal and whether an earlier period blocks a later one.
- Prepare sales, purchase, input-tax-credit, reverse-charge and payment data for each period. Do not recreate figures from bank receipts alone where books, invoices or e-invoices are required.
- File the earliest outstanding return, pay the displayed tax, interest, late fee and penalty, and save the acknowledgement.
- Repeat period by period until the account shows no unfiled return that is legally due, then reconcile the electronic liability and cash ledgers.
Restoration does not automatically reopen every feature immediately. If a return, refund, amendment or credit is unavailable, read the portal error and the order conditions; an officer may need to update the status or a separate application may be required.
Protect the first filing cycle
- Set calendar reminders before each due date and assign a named person to review the return.
- Reconcile outward supplies with invoices, e-invoice data and the books before filing.
- Reconcile eligible input tax credit with supplier data and statutory restrictions.
- Keep proof of tax payment and filed forms in a folder linked to the GSTIN and tax period.
- Review notices frequently after restoration; a restored account remains subject to ordinary compliance and enforcement.
Common failure points and practical fixes
| Problem | Why it happens | Practical response |
|---|---|---|
| REG-21 option is missing | The cancellation may have been taxpayer-requested, the GSTIN may not be eligible, the application window may have expired, or the account status may not yet be updated. | Recheck the order, effective date and status; verify the current rule and ask the jurisdictional authority about the correct route. |
| Application is rejected for return default | One or more returns, interest, late fee, penalty or tax amounts remain unresolved. | Prepare a period-by-period reconciliation, complete the required filings and payments, then respond to the notice with evidence. |
| Effective date is retrospective | The order reaches back earlier than the date shown in the portal status summary. | Rebuild the return and tax-period schedule from the order’s effective date and obtain professional advice for complex historical transactions. |
| Portal shows a payment or filing mismatch | A challan, ledger entry, ARN or return may be linked to a different period or GSTIN. | Download ledger and acknowledgement records, identify the mismatch and raise it through the current GST help or officer channel rather than filing duplicate returns. |
| REG-23 notice arrives | The officer needs clarification or intends to reject the application. | Reply in REG-24 by the notice deadline, addressing every ground and attaching indexed proof. |
| Post-restoration returns remain blocked | The registration status, prior-period sequence or order conditions have not been reflected correctly. | Confirm REG-22 is effective, file in chronological order and retain screenshots or error references when contacting the portal or officer. |
When professional help is worth the cost
Consider a GST practitioner or tax professional when the cancellation is retrospective, the backlog spans several years, turnover and input-tax-credit records do not reconcile, multiple states or registrations are involved, or the officer has issued a proposed rejection. The adviser should work from the cancellation order and ledgers, not merely promise that a form can be filed. For a short, clearly documented non-filing default, a taxpayer may be able to complete the process directly, provided the current deadline and portal requirements are verified.
Quick Recap
Official references
- GST Portal: Cancellation of Registration
- GST Portal: New Functionalities Made Available for Taxpayers during 2022
- CBIC Circular No. 99/18/2019-GST
- CBIC: CGST Rules compilation amended through 1 January 2022, Part B
- GST Portal: Search Taxpayers Using GSTIN/UIN
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