How to Fix Uncertain Transactions in Tally Prime While Filing GSTR-1 – Complete Step-by-Step Guide (2025)

Published on: 09-10-2025 Call CA Tally HelpDesk +91 9205471661, 8368262875

When preparing your GSTR-1 report in Tally Prime, you might come across a section called “Uncertain Transactions”. These are entries that Tally cannot classify under the correct GST category due to missing or incorrect information.

If not resolved, these uncertain transactions can cause incomplete or inaccurate GST return filing, leading to mismatches in your sales data or even rejection during JSON upload. This guide will help you understand what uncertain transactions are, why they occur, and how to fix them effectively in Tally Prime.

1. What Are Uncertain Transactions in Tally Prime?

In Tally Prime, uncertain transactions refer to sales or purchase vouchers where GST-related details are incomplete, inconsistent, or not clear enough for the software to determine their tax applicability.

These transactions appear in the GSTR-1 report under the section “Uncertain Transactions (Corrections Needed)”. Until they are corrected, Tally excludes them from the main report summary and doesn’t include them in your JSON export.

2. Common Reasons for Uncertain Transactions

There are several causes why a voucher gets classified as uncertain:

1. Missing GSTIN in Party Ledger:
   The customer or supplier’s GSTIN is not entered or is invalid.
2. Incorrect Place of Supply:
   The party’s state doesn’t match the state code in the GSTIN.
3. Wrong Nature of Transaction:
   The transaction type (B2B, B2C, Export, etc.) is not defined properly.
4. Invalid Tax Rate or Ledger Mapping:
   The item or service doesn’t have correct GST rates linked.
5. Incomplete Voucher Information:
   Mandatory GST details like taxable value or HSN/SAC code are missing.
6. Unregistered Party Sales Missing Classification:
   Sales made to unregistered customers are not marked correctly under B2C.

These issues prevent Tally from automatically categorizing the transactions under GSTR-1 sections such as B2B, B2C, or Exports.

3. How to Identify Uncertain Transactions in Tally Prime

You can easily locate these errors by following these steps:

1. Go to Gateway of Tally → Display More Reports → Statutory Reports → GST → GSTR-1.
2. Choose the correct return period using F2 (Period).
3. Scroll down to find “Uncertain Transactions (Corrections Needed)”.
4. Press Enter to view the list of affected vouchers.

Each entry will show a short description of the issue — for example, “Party GSTIN not specified” or “Tax rate missing.”

4. How to Fix Uncertain Transactions – Step-by-Step

Step 1: Verify Party Details

• Go to Gateway of Tally → Alter → Ledger → [Select Party Name].
• Under GST Registration Details, make sure:
  • GSTIN is correct and valid.
  • Registration Type (Regular, Composition, Unregistered) is properly selected.
  • State name and code match the GSTIN prefix.
• Press Ctrl + A to save.

Step 2: Correct Nature of Transaction

• Open the sales or purchase voucher that appears uncertain.
• Press F12: Configure → Provide GST Details → Yes.
• Under Nature of Transaction, select the right type:
  • Sales to Registered (B2B)
  • Sales to Unregistered (B2C)
  • Exports
  • Deemed Exports
• Save the voucher again.

Step 3: Check GST Rates and Ledger Mapping

• Make sure every item in the voucher has a valid GST rate.
• Go to Stock Item → GST Details → Taxability → Taxable and enter the correct rates for CGST, SGST, or IGST.
• If using services, verify the Sales Ledger GST configuration.

Step 4: Review Place of Supply

• If the transaction involves interstate sales, ensure place of supply is correctly chosen.
• For same-state transactions, ensure CGST and SGST are applied.

Step 5: Recheck in GSTR-1 Report

• After correcting all entries, go back to the GSTR-1 report.
• Press F5 → Exceptions → Uncertain Transactions.
• Confirm that all entries are now removed from the uncertain list.

Once cleared, the transactions will automatically appear under their proper heads like B2B, B2C, or Exempted in the GSTR-1 summary.

5. Preventing Uncertain Transactions in the Future

Here are some best practices to avoid this issue going forward:

• Always verify GSTINs before creating new party ledgers.
• Maintain proper HSN/SAC codes and tax rates in item masters.
• Use different sales ledgers for taxable, exempt, and export sales.
• Regularly check Error/Exception Reports before exporting returns.
• Keep Tally Prime updated through TSS for the latest GST schema support.

Following these practices ensures smooth, error-free GST return filing every month.

6. Final Thoughts

Uncertain transactions in Tally Prime are simply indicators that some data needs correction — not errors in your accounting itself. By reviewing the details, verifying GSTINs, and ensuring correct classification, you can fix these issues in minutes.

Once all uncertain entries are resolved, your GSTR-1 report becomes complete, accurate, and fully compliant with GST portal requirements — saving you from rejection or mismatch issues during filing.

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