How to Update Filed GSTR 1 of 2021-2022 and 2020-2021

Hello ,  I have filled GSTR 1 of last year (2020-2021) and (2021-2922) of all month. For the month of December(2020) and March 2022 there's mistake in Sale bill amount, How can I update this. I do not see edit option in any month of 2020-2021 and 2021-2022.Also I do not see amendement option in GSTR 1 option,Last year it was there.

Thanks  Keshav

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