how i can amend wrong GSTN entered in july 17 GSTN, i have to correct state code from 24 to 26 balance GSTN same. IGST paid correctly. GSTR-1 amendment table not started? can i call party to reject transaction, and upload manually, i will accept manual addition. in this case what about original invoice uploading IGST liability arise? i have to pay two time IGST or one time for manual addition? pl. guide