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How to Correct Errors in Filed GSTR-3B: Rectification & Adjustment SOP

July 24, 20268 min readAkib Husain

Quick Answer: How to Rectify Mistakes in Filed GSTR-3B Returns?

Because filed GSTR-3B returns cannot be edited directly, errors must be adjusted in subsequent monthly returns. Add under-reported tax liabilities to current month dues with 18% interest, or adjust excess tax paid against future liabilities.

  • GSTR-3B cannot be edited or revised directly once filed on the GST portal.
  • Under-reported tax liability must be added to subsequent GSTR-3B with 18% annual interest.
  • Excess tax paid can be adjusted against future liabilities or claimed as a refund via RFD-01.
  • Negative values cannot be entered directly into GSTR-3B return tables.

1. Adjustment Matrix for Common GSTR-3B Errors

Error ScenarioRectification MethodInterest / Penalty Rules
Under-reported Tax LiabilityAdd differential liability to current month GSTR-3B Table 3.1.18% p.a. interest from original due date until payment date.
Excess Tax PaidReduce future monthly tax dues or file RFD-01 refund application.No interest payable; retain reconciliation documentation.

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Akib HusainExpert Reviewer

Founder & Chief Architect of TrulyInvoice

Last Verified: July 24, 2026
TallyPrime FY 2026-27 (v4.0+)
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