Delay in filing GSTR-1

No he can claim the ITC if you have filed GSTR 1 because in GSTR2A the same is reflecting in the month of March 2019 itself.
so the condition of the claiming itc is fulfilled.

The impact of filing late return is not on the receiver it's on the supplier to pay late fee and interest and the month of March it's waived off till December 20919

Thank you so much. But they send debit note against that invoice in current date.

For their security you can send them a declaration stating that "If your credit will disallow in future due to the reason of delay filing we will pay you the amount equal to credit amount".
and ask them to cancel the debit note.

@ priya darshi, I think your customer can't claim credit because one can claim credit with in 180 days from the end of the financial year. As you filed GSTR 1 in November and your uploading invoice is also a condition for claiming credit by him as per sec 16.

But the customer already claimed the ITC and it's not the customer fault that supplier has not filed the return.
Customer is not eligible if he has not claim the ITC till due date of September month of subsequent year.
In practical scenario everyone is taking the credit even it is not reflecting in GSTR 2A.

Yeah earlier I thought the same what you have thought. But as per law if a person wants to take credit, his GSTR 2A should show the same then only he could. Now every one taking credit based on invoice but that is not as per law.

Yes I agree that is not as per law but as per my experience if you are able to provide all the supporting to the officer he can not disallow the credit.
supporting like..
- Tax invoice
- Payment details
- Return copy etc

Not summery generated by gstin. how can file gstr 1 returns filed under due date.?