Credit note of Jan 21 not shown in gstr1 and 3b can be added on oct21?

Rajesh TM (Accounts Manager) (132 Points)

20 October 2021  

Dear sir/madam

One credit note by mistake not been filed on gstr1 and 3b in the mth of Jan 21. can it be shown in the mth of oct 2021 in gstr1 and 3b?. can the tax amount be adjusted with coming filing?

Please help me to clear this. thanks in advance

Regards

Rajesh