Reuse Deleted Voucher Numbers in TallyPrime 7.1 (Unused Vouchers)

Your article assistant deletes sales invoice SI/26-27/0142 because the party was wrong. The next bill comes up as 0187. Now there is a hole in the series, and at GSTR-1 time someone asks where 0142 went. TallyPrime 7.1 finally puts the fix on the voucher screen itself, but only if one voucher type setting is right, and only if GST allows you to use it.

What Is the Unused Vouchers Option in TallyPrime 7.1?

When you delete a voucher under Automatic numbering, Tally can either keep the empty number aside or shuffle every later voucher up by one. If it keeps the number aside, that number becomes an unused voucher number. Before 7.1 you dug it out through More Details (Ctrl+I) and the voucher number details screen. In 7.1 a button on the right-hand bar lists the gaps for that voucher type. Pick one, and the new voucher takes it.

How to Reuse a Deleted Voucher Number in TallyPrime 7.1 — Step by Step

1. Go to Gateway of Tally > Alter > Voucher Type and select Sales (or whichever type has the gap). Check that Method of Voucher Numbering is Automatic. Under Manual numbering there is no unused list at all, because Tally never assigned the numbers in the first place.
2. Set Use Advanced Configuration to Yes. In the screen that opens, set the behaviour while inserting or deleting vouchers to Retain Original Voucher No. If this says Renumber Vouchers, change it today, before anyone deletes another invoice. Renumbering rewrites numbers you have already printed and sent.
3. In the same configuration screen, set Show Unused Vouchers Nos. in Transactions for Retain Original Voucher No. behaviour to Yes. Save with Ctrl+A. Tally tip: this setting is per voucher type. If you run separate series for Sales - Delhi and Sales - Mumbai, repeat it for each one.
4. Go to Gateway of Tally > Vouchers and press F8 for Sales (or switch to your custom sales type). Click Unused Vouchers on the right-hand button bar. You will see only the gaps for that voucher type and its current numbering series.
5. Select the number you want. Then press F2 and change the date to the date of the original deleted invoice. Tally does not stop you from putting number 0142 on a date after invoice 0186. That is exactly the kind of entry that looks like back-dating during an audit.
6. Complete the entry and save. Then open Gateway of Tally > Display More Reports > GST Reports > GSTR-1 and check the document summary. The series for the month should now run without a break. Tally tip: if your company has Edit Log enabled, the original deletion is still recorded there. Reusing the number does not erase that history, and it is not supposed to.

Mistakes That Cost Indian CAs Hours

• Leaving voucher types on Renumber Vouchers: one deletion in October shifts every later invoice number, so the printed bills, the e-way bills and the books no longer match. Fix: switch to Retain Original Voucher No. at once. Renumbered vouchers will not switch back, so correct the affected numbers manually against the copies you issued.
• Reusing a number that had an e-invoice IRN: the IRP rejects the same document number twice in a financial year, even after the IRN was cancelled within 24 hours. Fix: leave that number empty and report it as cancelled in Table 13 of GSTR-1. Raise the corrected invoice on the next number.
• Filling a gap with an unrelated sale weeks later: invoice 0142 dated 15 October beside 0141 dated 2 September breaks the consecutive serial idea in Rule 46 of the CGST Rules. Fix: reuse a number only to re-issue the same transaction on its original date. For anything else, use the next number.
• Deleting instead of cancelling: Alt+D removes the voucher and creates a gap that nobody can explain later. Fix: press Alt+X to cancel when an invoice was printed or sent. The number stays in the books, marked cancelled, and it shows as cancelled in your document count.
• Expecting the list after a financial year change: the unused list belongs to the current numbering series. If you restart numbering on 1 April with a new prefix such as SI/26-27/, gaps from SI/25-26/ will not appear here. Fix: deal with last year's gaps in last year's GSTR-1, not by reaching back now.

Pro Tips for 2026

Check every client's sales voucher types once, not when the problem shows up. It takes one screen per type, and Renumber Vouchers set by a previous accountant is the root cause of most series mismatches I see. Second, treat the Unused Vouchers list as a monthly review report, not just a picker. Open it before the GSTR-1 deadline on the 11th, and every number on it should either be reused on its original date or go into Table 13 as cancelled. Third, if a client uses Tally ERP 9, the same Retain Original Voucher No. and show-unused setting exists under Gateway of Tally > Accounts Info > Voucher Types > Alter. What ERP 9 lacks is the one-click button on the entry screen.