If there is a difference in GSTR-2A and GSTR-3B because of the reasons that supplier has
Then steps to be taken by the proper officer
If the ITC is claimed due to mentioning of the wrong GSTIN, then the proper officer of the actual recipient shall update the concerned jurisdiction about the same and disallow the ITC.
ITC pertaining to F.Y. 2017-18 can be claimed in GSTR-3B only till March 2019 only if the GSTR-1 of March 2019 is filed till the due date.
If the difference between ITC claimed in GSTR-3B and GSTR-2A is more than 5 lakhs.
The proper officer can ask the registered person to provide with a certificate from a Charted Accountant or Cost Accountant certifing that the invoices on which the ITC is claimed are for the goods or services
actually received by the recipient. The same certificate should have UDIN.
If the difference between ITC claimed in GSTR-3B and GSTR2A is upto 5 lakhs
The proper officer can ask the registered person to provide with a certificate from the concerned supplier certifing that the invoices on which the ITC is claimed are for the goods or services actually received
by the recipient and the tax has been paid by the supplier to the Govt. against the same invoice.