goods and service tax
Published on 31 July 2025
GST Reporting Update: New HSN Code Requirements for GSTR-1/1A
Starting with the May 2025 return period, the GSTN has quietly rolled out Phase 3 of HSN reporting in Table 12 of GSTR-1 and GSTR-1A—and it’s a shift that businesses, big and small, can’t afford to ignore. Whether you’re running a modest enterprise or managing high-volume transactions, these changes touch everyone.
Key GST Reporting Updates for HSN Codes (May 2025 Onwards)
1. Stricter HSN Code Requirements Based on Turnover
| Aggregate Annual Turnover (AATO) | Minimum HSN Digits | Applies to | Manual Entry Allowed? | Where in Return |
|---|---|---|---|---|
| Up to ₹5 crore | 4 digits | B2B & B2C supplies | ❌ Dropdown only | Table 12 (GSTR-1/1A) |
| Above ₹5 crore | 6 digits | B2B & B2C supplies | ❌ Dropdown only | Table 12 (GSTR-1/1A) |
So, what’s changed here?
For the first time, B2C HSN code reporting is now mandatory across the board—even for businesses with turnover up to ₹5 crore. Earlier, B2C entries were a bit of a grey area—optional or loosely enforced. That’s no longer the case.
Also, forget manual entries. The GST portal now requires all HSN codes to be selected only through a dropdown list. Once you select a code, the portal automatically fetches the official HSN description, leaving no room for guesswork or manual errors.
2. Clear Division in Table 12: B2B & B2C Sections
Table 12 isn’t what it used to be. It’s now split between B2B and B2C HSN summary entries—and yes, that means both segments require proper HSN reporting. No exemptions, no shortcuts.
3. Table 13 Is Now Mandatory
There’s a new non-negotiable on the list: Table 13 (Document Summary). This section captures all invoices and documents issued during the return period, and skipping it will simply block your GSTR-1 or GSTR-1A from being submitted. If you’ve been leaving this out, now’s the time to change course.
4. Auto-Validation and Portal Warnings
The system isn’t leaving much room for error anymore. Table 12 entries are now automatically cross-checked with related sections like 4A, 6B, and 9B. If something doesn’t match up, you’ll get system-generated warnings—and no, you can’t override them with manual edits. The dropdown rules the game now.
What Taxpayers Need to Do Now
Let’s keep it practical. Here’s how to stay ahead of these new rules:
** Check Your Turnover Bracket:** If your aggregate turnover is up to ₹5 crore, stick to 4-digit HSN codes. If you're above ₹5 crore, it's 6 digits—no exceptions.
** Upgrade Your Software & Train Your Team:** Your billing or accounting software must now work with the GSTN dropdown system. Also, make sure your accounts or filing staff know their way around the updated portal interface.
** File Table 12 & Table 13 Properly:** Yes, both are mandatory now. Table 12 should include HSN summaries for all outward supplies—including B2C, which used to be optional. Table 13 needs to reflect all documents and invoices for the period before you submit.
** Review Before You File:** The system will flag errors if there’s anything missing or mismatched. Returns won’t go through unless everything checks out, so it’s best to double-check before you hit ‘submit.’
Why All This Matters
This isn’t just bureaucratic red tape. These changes aim to:
- Ensure consistent and uniform HSN reporting across the country
- Prevent manual errors, duplication, and disputes over classifications
- Support faster and more accurate input tax credit reconciliation
- Help tax authorities improve analytics and crack down on fraud or leakage
In short, it's about making the GST framework more robust and less vulnerable to manipulation.
Quick Checklist for May 2025 Returns
- Check your turnover bracket—AATO ≤₹5 crore (4-digit HSN); >₹5 crore (6-digit HSN)
- Use dropdown only for all HSN entries in Table 12
- File both B2B and B2C HSN summaries under Table 12
- Complete Table 13 (Document Summary)—it’s mandatory
- Review system warnings and correct any issues—manual edits won’t be allowed
If you miss any of these steps, your GSTR-1/1A return will simply not be accepted. So, take a moment now to align your team, systems, and processes with these new GSTN-era compliance norms. Better safe than sorry.