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The most common avoidable failures are a legal-name mismatch with PAN records, an expired 15-day TRN, failed one-time passwords (OTPs), and blank, unreadable, incorrectly combined, or unsuitable premises documents. The workflow below shows how to prevent and correct each one.
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What you need before opening the GST application
GST registration is an online process, but the application depends on identity, address, and authorization records that must agree with one another. Assemble the information first so that you do not create a draft with inconsistent dates or names.
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- The PAN of the taxpayer or legal entity.
- An email address and Indian mobile number for the primary authorised signatory. You must be able to receive separate OTPs on both channels.
- State or Union Territory and district in which the business is registered.
- Details of the business constitution, promoters or partners, authorised signatory, principal place of business, and any additional places.
- A clear scan or photograph of each document required by the official GST document checklist.
- Access to the authentication method the portal assigns: Aadhaar OTP, biometric and document authentication, DSC, e-sign, or EVC.
Use only the official portal address. Do not begin from an agent’s link or an advertisement that asks for your credentials. The portal’s menu path is Services > Registration > New Registration.
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Part A: create a TRN
Part A identifies the taxpayer and creates the draft reference you will use to return to the longer application.
- Open the GST Portal and choose Services > Registration > New Registration.
- Select Taxpayer as the applicant type.
- Select the relevant State or Union Territory and district.
- Enter the legal name exactly as it appears in PAN records. Do not substitute a trade name in this field.
- Enter the PAN, primary authorised-signatory email address, and Indian mobile number.
- Submit Part A. The portal sends one OTP to the email address and another to the mobile number.
- Enter both OTPs. Each OTP is valid for 10 minutes.
After both OTPs are validated, the portal displays a Temporary Reference Number. Save it immediately, along with the date and contact details used. A screenshot or written record helps if you have to leave the session.
Return to a saved application with the TRN
From New Registration, select the option for an existing TRN rather than starting Part A again. Enter the TRN, the email address used for the draft, and the CAPTCHA. The portal sends fresh OTPs; verify them to reopen Part B.
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A saved application is available for 15 days. If it is not submitted within that period, the portal purges the TRN and all information saved against it. An expired TRN cannot be revived: start a new registration and re-enter the information.
Complete Part B in the portal’s tab order
Part B is divided into tabs. Complete every tab that applies to your constitution and registration reason, and keep dates consistent with the underlying deeds, incorporation records, leases, or other evidence.
Business Details
Enter the business’s legal and trade details, constitution, date of commencement where requested, and the reason for registration. The legal name must continue to match PAN-linked information. Inconsistent dates or names can lead to clarification or rejection.
Promoters or Partners
Add each promoter, partner, proprietor, or other person requested for your constitution. Enter identity details exactly as shown on the supporting records. Keep the list consistent with the entity’s governing documents.
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Authorised Signatory
Identify the person who will sign and receive portal communications. Verify the email and mobile number because OTPs, acknowledgements, and notices are sent there. Upload the signatory evidence requested for the applicant category.
Principal Place of Business
Provide the complete address and possession details for the main premises. Select the nature of possession accurately, such as owned, rented, leased, or another category shown by the portal. The proof you upload must correspond to that selection.
Additional Places of Business
Add every additional location that is part of the registration application. For each location, provide the address and the applicable possession evidence. Do not attach a principal-place document to an additional-place entry unless it actually proves that location.
Goods and Services
Select the goods and services the business supplies. Use the applicable HSN or service classification options presented by the portal and avoid selecting categories that the business does not provide merely to broaden the list.
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Complete fields that appear for the selected State or Union Territory. Requirements can vary by location and applicant type, so read each prompt instead of assuming that a field can be skipped.
Aadhaar Authentication
The portal may ask promoters, partners, or authorised signatories to complete Aadhaar authentication. The people and sequence depend on the applicant and the portal’s determination. Follow the names and deadlines displayed in your application.
Verification
Review the declaration, confirm that the information and attachments are true and legible, and select the submission method available to you. Correct errors before signing; a later amendment does not replace a required registration document.
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Bank-account information is not part of the initial mandatory registration workflow described in the GST registration manual. It can be added later through the relevant amendment process, so do not delay the initial application waiting for a bank-account tab.
Documents: what to prepare and how to match them
The official document checklist controls which evidence is accepted for your taxpayer category. It also specifies permitted file formats, file-size limits, and whether several pages may be combined into one upload. Open the current checklist before scanning anything and follow its rule for each field.
| Document area | What the evidence must establish | Practical preparation |
|---|---|---|
| PAN-linked identity | The applicant’s PAN and legal identity | Check spelling and legal name against the PAN database before entering Part A. |
| Promoters, partners, and authorised signatory | The identity and role of each person listed in Part B | Use records that correspond to the names and roles entered in the relevant tabs. |
| Principal place of business | The address and the applicant’s right to use the premises | Select the possession category that matches the premises and upload an accepted proof, such as a property-tax receipt where the checklist permits it. |
| Additional places | Each added location and its possession | Keep evidence for each address separate unless the checklist allows several pages to be combined. |
| Category-specific records | Any extra evidence required for the constitution, state, or registration reason | Review the checklist for the exact category before submission. |
Proof of the principal place of business is a central requirement. A property-tax receipt is one example of an accepted category where the checklist allows it; the correct choice depends on how the premises are held. A document that proves ownership may not prove a tenancy, and a lease for a different address cannot support the principal-place entry.
Fix document-upload errors before submitting
Blank-file warning
The portal will not accept a blank attachment. Its instruction is: “The user must re-upload the document and cannot proceed with the application until a valid document is uploaded.” Replace the file with a document that opens correctly and contains the required pages.
Unreadable scan or photograph
If the portal flags a file as hard to read, choose Retry, not Continue. Create a sharper scan or photograph with all text, seals, signatures, and page edges visible, then upload the replacement.
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Compare the file with the checklist’s permitted format and size limit for that document field. If the checklist requires multiple pages in one file, combine the complete set in the stated order. Do not split pages across unrelated fields or omit a reverse side that contains material information.
Evidence does not match the selected category
Return to the premises tab, confirm the nature of possession, and choose an evidence type that proves that exact relationship. Uploading a clear document is not enough if it proves a different type of possession or a different address.
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Choose the authentication and submission route
The portal determines which route applies. The available choices differ in whether an in-person visit is required and which people must authenticate.
| Route | What happens | People or action involved |
|---|---|---|
| Aadhaar OTP | Identity is confirmed through OTP-based Aadhaar authentication. | Promoters, partners, or authorised signatories named by the portal complete the OTP steps. |
| Biometric and document authentication | The applicant is directed to a designated GST Seva Kendra for in-person verification. | The persons identified by the portal attend with the requested documents and complete biometrics. |
| DSC | The authorised signer signs electronically with a Digital Signature Certificate. | The eligible authorised signatory uses the registered DSC and follows the portal signing prompts. |
| E-sign | The signer completes the portal’s electronic-sign flow. | The authorised signer follows the identity and OTP prompts presented by the service. |
| EVC | The signer verifies electronically through the portal’s electronic verification code process. | The authorised signer uses the registered contact channel requested by the portal. |
If biometric or document authentication is triggered, book and attend the appointment at the designated GST Seva Kendra shown by the portal. Do not assume that an Aadhaar OTP alone completes the case when the application specifically asks for an in-person step.
Submit and preserve the ARN acknowledgement
- Review every tab, declaration, date, address, and attachment in Part B.
- Complete the authentication method displayed for your application.
- Submit the application from the Verification tab.
- Wait for the success message and ARN. The acknowledgement is generally sent to the registered email address and mobile number.
- Save the ARN, submission date, acknowledgement message, and a copy of the final application records.
An ARN confirms that the application was submitted; it is not itself an approval. Use it to track the case and to identify any notice or next action.
Track an application and respond to notices
Go to Services > Registration > Track Application Status and enter the requested ARN and details. The status message tells you whether the application is pending, under tax-officer processing, approved, or rejected, and whether the portal has issued a notice requiring action.
- Pending or officer processing: Read the status and any notice, then follow the stated response or appointment step. Do not create a duplicate application while the original ARN remains under consideration.
- Clarification or document request: Provide the requested explanation or replacement evidence through the response facility and keep the submission acknowledgement.
- Rejected: Identify the specific reason in the order or communication, correct the underlying mismatch or document problem, and submit a new application when the portal requires a fresh registration.
Official known-issues material records that some applications remain pending for tax-officer processing. A pending message therefore calls for status-based follow-up, not repeated submissions.
Rejection and failure fixes
PAN or legal-name mismatch
Compare the legal name in Part A with the PAN database character by character, including punctuation and spacing where shown. Correct the entry before submitting a new draft. A trade name belongs in the trade-name field, not in the PAN legal-name field.
Expired TRN
If more than 15 days passed without submission, the TRN and all information saved against it have been purged. Start a new registration and complete Part A again; the old TRN cannot reopen the deleted draft.
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OTP failure or timeout
Each OTP is valid for 10 minutes. Request a fresh OTP and enter it promptly. Confirm that the email inbox, spam folder, and Indian mobile number are accessible before retrying.
Blank or unreadable attachment
Use Retry, upload a valid and legible file, and verify that it opens before proceeding. The portal blocks progress until a valid document replaces a blank upload.
Incorrect premises proof
Recheck the selected possession type, address, document category, file format, size, and page-combination rule against the official checklist. Replace evidence that proves another address or another legal relationship to the premises.
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Pending status
Use the ARN status service and read the latest portal message. If the case is with a tax officer, wait for the stated processing or clarification action rather than submitting duplicate applications.
Download the GST registration certificate after approval
Approval is communicated through the registered contact channels. Once the status shows approval, sign in and open Services > User Services > View/Download Certificates. Download the registration certificate, retain the approval communication, and keep the ARN with your business records.
If the certificate option is not visible, first confirm that the ARN status is approved rather than pending or rejected. Then refresh the portal session and check the same View/Download Certificates path.
Quick Recap
A practical submission checklist
- Official portal address opened and menu path verified.
- Legal name checked against PAN records.
- State, district, email, and Indian mobile number confirmed.
- Both Part A OTPs completed within 10 minutes.
- TRN recorded and 15-day submission deadline noted.
- All applicable Part B tabs completed with consistent dates and addresses.
- Principal-place and additional-place evidence matched to possession type.
- Files opened successfully, are legible, use an accepted format, meet the checklist size limit, and include every required page.
- Required promoters, partners, and authorised signatories identified for authentication.
- Authentication completed through the route displayed by the portal.
- ARN acknowledgement saved after submission.
- Application status checked through Track Application Status.
- Certificate downloaded from View/Download Certificates after approval.
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