GST Network on Friday said businesses can now make changes to the forms uploaded to the portal to claim transition credit.
The functionality to fill the claim form was provided on the GSTN portal in August 2017.
The government in September allowed for one-time revision of TRAN-1.
The facility to revise TRAN-1 declaration has been enabled for taxpayers who had already filed it, said GSTN, the company which developed the IT backbone for the new indirect tax regime.
Revision can be either an increase or decrease of credit in comparison to the original credit.
If the revision is to reduce the credit claimed previously then the taxpayer will be able to file only if he has sufficient balance in his credit ledger," GSTN said.