gstr1 invoice number

You can correct it In your next Gstr1 under table "Amendment b2b"

tq sir but here the problem is 111 invoice is actually there in january month but 111 number was already used instead of 11 in august month. now how can i rectify it?? when i tried to rectify the august invoice i can able to rectify it but i could not able to add the actual invoice as invoice number i. e 111 was already used

Prefix it with any alphabet .

okayy sir tq so much