CASeetharaman KC on Feb 14, 2019
As far as my knowledge goes there is no mechanism provided in the GSTN system by which a buyer can lock the invoices uploaded by the seller. In any case the mechanism of taking input credit is based on the tax invoice provided by the seller and hence this sort of facility may not be required. The only thing which could probably be done is that you could download GSTR-2A and mark the date on which it was downloaded to compare the input credits which have been taken. This is probably the reason why the last date for taking input credits for a financial year has been fixed as 30th September of the subsequent financial year, so that all adjustments and corrections can be made by the Supplier by this time