ReduceTAX
BlogsPricing
LoginSign Up
HomeGuidesGSTR-1 Filing
FY 2025-26 · AY 2026-27
Updated September 2026

Comprehensive Guide to Filing GSTR-1 on GST PortalStep-by-step instructions for FY 2025-26

Learn how to accurately file your GSTR-1 return on the GST Portal for FY 2025-26. This guide covers everything from logging in to submitting your return, ensuring compliance with Indian tax laws.

Table of Contents
1

Log in and navigate to the GSTR-1 return


2

Select quarterly or monthly GSTR-1 filing


3

Download and edit e-invoice data


4

Enter details for the current tax period


5

Generate the GSTR-1 summary


6

Preview the GSTR-1


7

Acknowledge and submit the GSTR-1 return


8

File GSTR-1 with DSC or EVC


9

FAQs on GSTR-1 Filing

Log in and navigate to the GSTR-1 return

  1. Accessing the GST Portal

    Begin by logging into the GST Portal using your credentials.

    • Visit the official GST Portal at gst.gov.in.

    • Enter your username and password to log in.

    • Navigate to the 'Services' section.

  2. Navigating to Returns Dashboard

    Find the Returns Dashboard to access your GSTR-1 filing.

    • Click on 'Returns' in the drop-down menu.

    • Select 'Returns Dashboard' from the options.

    • Choose the appropriate financial year and period.

Select quarterly or monthly GSTR-1 filing

  1. Choosing Filing Frequency

    Decide whether to file GSTR-1 monthly or quarterly based on your turnover.

    • If turnover is up to ₹5 crore, opt for quarterly filing.

    • For turnover above ₹5 crore, monthly filing is mandatory.

    • Select the correct option on the 'File Returns' page.

  2. Understanding Due Dates

    Be aware of the deadlines for filing GSTR-1.

    • Monthly filers must submit by the 11th of the following month.

    • Quarterly filers have until the 13th of the month after the quarter ends.

    • Late filing may attract penalties under Section 47.

Download and edit e-invoice data

  1. Downloading E-Invoice Data

    Retrieve e-invoice data from the GST Portal for applicable entities.

    • Click on 'DOWNLOAD DETAILS FROM E-INVOICES (EXCEL)'.

    • Ensure data is updated from the IRP within 48 hours.

    • Check tables 4A, 4B, 4C, 6B, 6C for auto-populated data.

  2. Editing E-Invoice Details

    Make necessary amendments to the e-invoice data.

    • Verify all B2B and export invoice details.

    • Correct any discrepancies before submission.

    • Ensure credit/debit notes are accurately reflected.

Enter details for the current tax period

  1. Filling B2B Invoice Details

    Enter all B2B transactions for the current period.

    • Access the B2B Invoices tile.

    • Add invoices with GSTIN, invoice number, and date.

    • Include taxable value and tax amounts.

  2. Filling B2C Invoice Details

    Report B2C transactions, especially large invoices.

    • Use the B2C (Large) Invoices tile for entries.

    • Enter details for invoices above ₹2.5 lakh.

    • Include place of supply and tax amounts.

  3. Handling Credit/Debit Notes

    Ensure all credit and debit notes are recorded.

    • Enter registered notes in the CDNR tile.

    • Use CDNUR for unregistered notes.

    • Verify amendments in the respective sections.

  4. HSN Code Summary

    Provide HSN-wise summary of outward supplies.

    • Select HSN codes from the drop-down menu.

    • Enter total taxable value and tax amount.

    • Ensure accuracy to avoid mismatches.

Ensure all entries are accurate to prevent any discrepancies in tax liability.

Generate the GSTR-1 summary

  1. Creating the Summary

    Generate a summary of your GSTR-1 return before submission.

    • Click on 'Generate GSTR-1 Summary'.

    • Review the auto-calculated figures.

    • Ensure all sections are complete.

  2. Reviewing the Summary

    Check the summary for any errors or omissions.

    • Verify B2B and B2C totals.

    • Ensure credit/debit notes are included.

    • Check HSN summary for accuracy.

Preview the GSTR-1

  1. Using the Preview Function

    Preview your GSTR-1 return to catch any errors.

    • Click on 'Preview GSTR-1'.

    • Review the PDF for discrepancies.

    • Make any necessary corrections before submission.

  2. Importance of Preview

    Understand why previewing is crucial.

    • Prevents submission of incorrect data.

    • Allows for last-minute adjustments.

    • Ensures compliance with GST norms.

Acknowledge and submit the GSTR-1 return

  1. Acknowledging the Return

    Acknowledge the accuracy of your return before submission.

    • Click on 'Submit' to freeze data.

    • Ensure all entries are final.

    • Notify buyers of the submission.

  2. Final Submission

    Complete the submission process for GSTR-1.

    • Click on 'File Return' to submit.

    • Choose DSC or EVC for authentication.

    • Receive an ARN as confirmation.

File GSTR-1 with DSC or EVC

  1. Using Digital Signature Certificate (DSC)

    File GSTR-1 using a DSC for authentication.

    • Ensure DSC is registered on the GST Portal.

    • Select 'File with DSC' option.

    • Follow prompts to complete filing.

  2. Using Electronic Verification Code (EVC)

    Opt for EVC if DSC is not available.

    • Select 'File with EVC' option.

    • Receive OTP on registered mobile/email.

    • Enter OTP to complete the filing process.

FAQs on GSTR-1 Filing

What is the due date for filing GSTR-1?

For monthly filers, GSTR-1 is due by the 11th of the following month. Quarterly filers must submit by the 13th of the month after the quarter ends.


Can I revise my GSTR-1 after submission?

No, once GSTR-1 is submitted, it cannot be revised. Ensure all details are correct before final submission.


What happens if I miss the GSTR-1 filing deadline?

Missing the deadline may result in a late fee of ₹50 per day (₹25 CGST + ₹25 SGST) up to a maximum of ₹5,000.


How do I handle amendments in GSTR-1?

Use the amendment sections like 9A, 9C to correct previous period entries. Ensure amendments are made in the next filing period.


Is it mandatory to file GSTR-1 if there are no sales?

Yes, even if there are no sales, a nil GSTR-1 must be filed to remain compliant.


How do I report exports in GSTR-1?

Report export invoices under section 6A. Ensure to include shipping bill number and date.


What is the penalty for incorrect GSTR-1 filing?

Incorrect filing may attract penalties under Section 122, including fines and interest on unpaid tax.


Can I file GSTR-1 offline?

Yes, you can use the GST Offline Tool to prepare and upload your return. However, final submission must be done online.


What is the role of HSN codes in GSTR-1?

HSN codes classify goods and services. Accurate reporting in section 12 ensures compliance and avoids mismatches.


How do I handle B2C transactions in GSTR-1?

Report B2C transactions under sections 5A, 5B for large invoices, and section 7 for others. Ensure place of supply is correctly mentioned.

Related Tools & Guides

Income Tax Calculator FY 2025-26

Old vs new regime side-by-side comparison

Find a CA for ITR Filing

Verified CA assistance from ₹499

Income Tax Slab FY 2025-26

New & old regime slab rates comparison

RD Calculator

Calculate recurring deposit maturity & interest

ITR Filing Last Date FY 2025-26

Key due dates for individuals, audit & belated returns

Tax Saving FD Guide

Section 80C, best rates, lock-in & taxability
ReduceTAX - Professional Tax Services

India's trusted tax filing platform. Expert CAs, simplified process, maximum savings.

+91-9521859556

support@reducetax.in

Tax Filing

  • Self File ITR
  • CA Assisted ITR
  • NRI Tax Filing
  • Income Tax Filing
  • ITR Filing
  • Income Tax Notice Reply
  • Find a CA Near Me
  • Tax Filing Pricing

Tax Calculators

  • Income Tax Calculator
  • HRA Calculator
  • Crypto Tax Calculator
  • 80D Calculator
  • Gratuity Calculator
  • All Tax Tools

Business & Compliance

  • GST Registration
  • GST Return Filing
  • TDS Return Filing
  • Company Incorporation
  • Company Registration
  • Company Filing
  • Trademark Registration
  • Remote Accounting
  • Digital Signature (DSC)
  • All Services →

Company

  • Pricing
  • Blogs
  • All Articles
  • Contact Us

Services

  • File ITR Online
  • CA Assisted ITR
  • Income Tax Notice
  • TDS Return Filing
  • GST Return Filing
  • Company Incorporation
  • DSC Solution

Tools

  • Income Tax Calculator
  • HRA Calculator
  • Crypto Tax Calculator
  • 80D Calculator
  • 80DD Calculator
  • 80U Calculator
  • Section 80T Calculator
  • Gratuity Calculator
  • Rent Receipt Generator
  • Salary Slip Generator
  • All Tools

Knowledge Center

  • Income Tax Slab FY 2025-26
  • ITR Filing Guide
  • Old vs New Tax Regime
  • Capital Gains Tax
  • Section 80C Deductions
  • HRA Guide FY 2025-26
  • All Tax Guides →

Legal

  • Terms & Conditions
  • Privacy Policy
Recognised by
Authorised Partner — Income Tax Department, Govt. of India

Income Tax Dept.

DPIIT Recognised Startup · Startup India ID: OI-0326-9413YM

DPIIT · Startup India

iStart Rajasthan — Govt. of Rajasthan

iStart Rajasthan

© 2026 TK Business Solution Private Limited. All rights reserved.Made with ❤️ for Indian taxpayers