For Regular Schemes
GSTR-3B (Feb, 2021)- Mar 20th 2021
GSTR-1 (Feb, 2021) -Mar 11th, 2021
GSTR-1 (Jan-Mar, 2021)- Apr 13th, 2021
GSTR-9 (2019-20)- Mar 31st, 2021
GSTR-9C (2019-20)- Mar 31st, 2021
GSTR-5 (Feb, 2021)- Mar 20th, 2021
GSTR-6 (Feb, 2021)- Mar 13th, 2021
GSTR-8 (Feb, 2021)- Mar 10th, 2021
For Composition scheme
CMP-08 (Jan-Mar, 2021)- Apr 18th, 2021