Most GST Portal errors can be resolved by identifying the stage that failed: JSON generation, file validation, portal processing, summary creation, digital signing or final submission. Start with the exact status message, preserve the downloaded error file, correct the underlying record in the current GSTN tool, and regenerate rather than editing JSON by hand.
First identify where the failure occurred
The same invoice can fail for completely different reasons depending on when the portal stops processing it. Use this map before changing data:
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| Portal symptom | Failure stage | Correct first action |
|---|---|---|
| File could not be uploaded | Local JSON or schema validation | Validate the file against the current GSTR-1 schema, correct required fields and regenerate it. |
| Processed with Error | Portal processing after upload | Generate the error report, correct every listed row in the Returns Offline Tool and upload a newly generated JSON. |
| Invoices uploaded but counts are unchanged | GSTR-1 summary processing | Use GENERATE GSTR1 SUMMARY once the permitted interval has elapsed, then wait for automatic processing. |
| Authentication has failed at emas (RT-3BAS1031) | Digital-signature authentication | Match the selected authorized signatory and PAN-based certificate, then retry. |
| Your previous GSTR3B filing request is still in progress | Duplicate or pending submission request | Wait at least 10 minutes, reopen the return period and restart the nil-filing flow. |
Save the GSTIN, financial year, return period, time of failure, browser message, downloaded report and exact error code. Those details are needed if GSTN support or a tax professional must investigate the case.
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Fix “Processed with Error” uploads
“Processed with Error” does not mean the entire upload is lost. GSTN’s Returns Offline Tool guide says that, after processing, the status changes to Processed with Error and the Error Report column provides a Generate error report link.
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- Open the relevant GSTR-1 upload page and wait until processing has finished.
- In the Error Report column, select Generate error report.
- Allow approximately 15 minutes for the link to become available. The report is downloaded as a ZIP file.
- Open the ZIP directly in the current GSTN Returns Offline Tool. Do not alter the generated JSON manually.
- Review every row and every message in the report. A file can contain several independent errors, so fixing only the first visible line may leave the upload unsuccessful.
- Correct the source invoice or credit/debit-note data in the offline tool, including the field identified by the report.
- Regenerate the JSON from the corrected source data and upload the new file.
- Check the new status and download another report if errors remain.
Keep the original upload and its report in your records. They show which records were accepted, rejected or still require correction and prevent accidental re-entry of already accepted invoices.
Fix “File could not be uploaded” before it reaches portal processing
This message usually points to a malformed JSON file, an outdated schema or a missing required property. Download the latest GSTN offline tool and the current GSTR-1 schema before rebuilding the file. GSTN’s known-issues procedure uses the GST developer API schema and a JSON validator to locate structural problems.
Validate the JSON structure
- Export or create the return data in the current Returns Offline Tool.
- Obtain the schema that applies to the current GSTR-1 version. A schema from an earlier release may reject fields or require a structure that the portal no longer accepts.
- Run the JSON through a schema validator and read the complete path of each error, not just the headline.
- Correct the source record in the offline tool and regenerate the JSON. Never open a generated file in a text editor and change values directly; doing so can break formatting, totals or relationships between sections.
- Upload the regenerated file and retain the validation result for your records.
Supply every required field
A missing required property can produce the same generic upload message. GSTN’s example is a missing UQC (Unit Quantity Code) in an HSN section. Check quantity, unit, rate, taxable value, tax rates, place-of-supply and document-number fields wherever the schema marks them as mandatory. If a field is not applicable, use the tool’s permitted value or blank option rather than inventing a code.
When the validator reports several errors, correct them in batches and regenerate once. If the validator passes but the portal still rejects the file, retain the successful validation output and move to identity, date and duplicate checks.
Check GSTIN, invoice dates and document identity
Match the supplier GSTIN to the logged-in taxpayer
The supplier GSTIN inside the JSON must be the GSTIN of the taxpayer currently signed in to the portal. A file prepared for one registration cannot be uploaded from another registration merely because the legal entity is the same. Confirm the GSTIN character by character, including state-code digits and the checksum character.
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An “Enter valid GSTIN/UIN” message can indicate an invalid value or an incorrect structure. Remove spaces and punctuation that the offline tool does not permit, and reselect the registration in the tool rather than typing over a generated value.
Do not use dates before registration
GSTN rejects an invoice date earlier than the supplier’s GST registration date. Compare the invoice date with the effective registration date shown for that GSTIN. If the date is genuinely wrong, correct the commercial document and source record according to your accounting and tax procedures; do not change the date solely to bypass validation.
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Confirm that the invoice belongs in the selected financial year and tax period and that the section matches the document type. A business-to-business invoice, export document, credit note and amendment have different required fields. Moving a record to the correct section in the offline tool is safer than trying to force it into a section with fewer fields.
Remove duplicate invoices and repair amendments
Duplicate supply invoices
GSTR-1 does not accept duplicate supply invoices. Compare the supplier GSTIN, financial year, document type, invoice number, invoice date and taxable value against records already uploaded for that period. Differences in capitalization, leading zeros or punctuation can hide a duplicate during a spreadsheet review, so normalize those fields before comparing.
If an invoice was accepted in an earlier upload, do not upload it again simply because the tile count has not refreshed. Generate the summary after the required interval and allow processing to complete.
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“Original Invoice cannot be tracked”
An amendment must point to an original invoice that the portal can find. Search the original invoice in the relevant period and section. If it is absent, upload the original first, wait for it to process, and then submit the amendment with the exact original invoice number and date. Check that the original was not uploaded under a different GSTIN, period, document type or numbering format.
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Where an original was rejected, fix and upload that original before attempting the amendment. Keep the error report that explains the rejection; it identifies whether the problem is the original record or the amendment reference.
When uploaded invoices do not appear in GSTR-1
Successful file upload and visible GSTR-1 counts are separate events. At the bottom of GSTR-1, select GENERATE GSTR1 SUMMARY. GSTN states that tile counts update after summary generation, not necessarily immediately after a file upload.
- Confirm that the upload status is processed successfully rather than Processed with Error.
- Open the relevant GSTR-1 period and scroll to the bottom of the form.
- Select GENERATE GSTR1 SUMMARY.
- Do not submit repeated requests while the first one is running. GSTN cites a minimum 10-minute interval for repeated summary-generation requests; a second request sooner can return an error.
- Allow the portal’s automatic processing time. A delayed tile does not by itself prove that invoices were deleted.
- After processing, search for a specific invoice and compare the resulting count with your accepted upload records.
If the summary still excludes an invoice after processing, inspect the upload result and error report for that invoice rather than creating a duplicate upload.
Resolve DSC, emSigner and EVC filing failures
Digital signature prerequisites
GSTN’s GSTR-1 FAQ states that the GST Portal accepts PAN-based DSCs only. Before signing, verify all of the following:
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- The certificate is issued against the PAN of the authorized signatory.
- The certificate is registered on the GST Portal and has not expired or been revoked.
- The selected authorized signatory in the filing session is the same person represented by the certificate.
- The required emSigner version is installed and running.
- The DSC dongle is connected and recognized by the computer.
A generic USB storage drive is not a DSC token. Use the certificate token supplied by the certifying authority and follow the current GSTN installation requirements for emSigner. If the certificate has expired, renew and register the replacement before attempting to sign.
Authentication has failed at emas (RT-3BAS1031)
GSTN lists this error as commonly occurring when the DSC certificate is associated with a PAN different from the selected signatory. Sign out, confirm the authorized signatory’s PAN and registered certificate, select the matching certificate in the signing dialog and retry. If multiple certificates are installed, remove ambiguity by selecting the certificate whose subject and PAN correspond to that signatory.
Use EVC when the filing permits it
Electronic Verification Code (EVC) is an alternative where the return and taxpayer category allow it. The OTP is sent to the authorized signatory’s registered email address and mobile number. Confirm that both contacts can receive messages and that the OTP is entered before it expires. EVC does not repair a data error; it only replaces the signing method after the return passes validation.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Fix a GSTR-3B request that remains in progress
For the message Your previous GSTR3B filing request is still in progress, GSTN advises waiting at least 10 minutes before retrying the entire nil-filing process for that return period.
- Stop submitting additional requests immediately; repeated clicks can create more pending transactions.
- Wait at least 10 minutes.
- Return to the Returns Dashboard.
- Select the financial year and tax period again.
- Restart the nil-filing flow from the beginning and complete the verification method available to you.
If the message persists after the waiting period, record the exact time, period and request status. Do not assume that a second submission succeeded until the portal displays a completed filing acknowledgement.
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IFF and e-invoice validation errors
Invoice Furnishing Facility (IFF)
An IFF message such as Error in submission can mean that the cumulative value reported has exceeded the applicable limit. Remove enough records to bring the current period within the limit, submit the permitted set, and report the remaining records in the next period. Recalculate cumulative values across earlier submissions before retrying; deleting a row from the current screen may not reduce a limit that was already reached by accepted records.
Invalid HSN codes and e-invoice rejection
For e-invoice errors, verify each HSN code against the current IRP rules and the nature of the goods or services. The IRIS IRP troubleshooting guidance identifies invalid HSN code error 2176. Check code length, whether the code is active for the transaction date and whether the item description matches the selected classification.
For taxpayers with aggregate annual turnover (AATO) of ₹10 crore or more, IRIS IRP records a rule effective 1 April 2025 requiring e-invoices to be reported within 30 days of the invoice date. A late report can fail even when the JSON fields are otherwise correct. The same guidance records a February 2026 relaxation for specified RSP-based value validations. Because IRP rules and exceptions change, verify the current advisory applicable to your turnover, transaction type and invoice date before relying on an exception.
A practical escalation checklist
Escalate only after the local data and setup checks are complete. Include:
- GSTIN of the logged-in taxpayer and the affected supplier or recipient GSTIN, where relevant.
- Financial year, return period and section, such as B2B, export, amendment, IFF or GSTR-3B.
- Exact portal status or error text, including codes such as RT-3BAS1031 or 2176.
- Time and date of the attempt, with your time zone if support is outside your region.
- Offline-tool version, schema version and emSigner version.
- Original upload filename, generated error-report ZIP and a list of corrected rows.
- Whether the failure occurred during JSON generation, upload, processing, summary generation, signing or submission.
Remove passwords, private keys, DSC PINs and unrelated personal data before sharing files. GST Portal screens, offline-tool versions, schemas, error codes and IRP validations change, so check the latest GSTN advisory and tool release on the day you retry.
Prevent repeat failures on the next filing
- Use the current Returns Offline Tool and schema for every return period.
- Maintain a master GSTIN and registration-date list for all registrations handled by your team.
- Validate invoice-number uniqueness before exporting JSON.
- Keep original invoices and amendments linked by a stable internal identifier.
- Run a required-field check for UQC, HSN, tax rate, place of supply, document date and document number.
- Upload in manageable batches so an error report can be mapped to individual source rows.
- Wait for processing before generating a summary or starting an amendment.
- Keep one authorized signatory and one matching, unexpired PAN-based DSC configured for each registration.
- Record successful acknowledgements and accepted invoice ranges after every upload.
The reliable pattern is consistent: identify the failed stage, preserve the evidence, correct the source data or local signing setup, regenerate through the current GSTN tool, and wait when the portal is still processing. That avoids duplicate submissions and gives support the exact information needed to resolve a remaining error.
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