RECTIFICATION IN GSTR1

Yes...you can pass a credit note if the initial entry was made under B2CL. If entered under B2C, you can show the figures in negative in GSTR 1.

IS IT NECESSARY TO PASS CREDIT NOTE ENTRY FOR CORRECTION OF ENTRY MADE IN B-C IN GSTR1 OF PREVIOUS MONTH?

@ Krishanu Chowdhury, In case an invoice has been raised to the customer properly, but incorrectly disclosed in Form GSTR-01:
Amend the B2Cs while filing March month return; and
Disclose the proper invoice in B2B of March month return.

Note: amendment can be done only once, so while amending the B2Cs please be cautious...👍