A return is a declaration statement that is filed by the tax payer to tax authorities to confirm his turnover or income particulars and claim any benefits like Input Tax Credit. 

There are 11 types of returns in GST

GSTR1: details of outward supplies

GSTR1A: details of outward supplies as modified

GSTR2: details of inward supplies

GSTR2A: auto populated inward supplies

GSTR3: monthly returns

GSTR3A:  notice to person who failed to furnish return

GSTR4: Quarterly return for Composition dealer

GSTR4A: inward supplies to Composite dealer

GSTR5: return for non-resident tax payer

GSTR6: ISD return

GSTR6A: details of inward supplies to ISD

GSTR7: returns for authorities deducting tax at source

GSTR7A: TDS certificate

GSTR-ITC1: input Tax credit claim

GSTR8: details of supplies through e-commerce

GSTR9: Annual Return

GSTR9A: simplified Annual Return

GSTR9B: Reconciliation Statement

GSTR10: final statement

GSTR11: details of inward supplies by person having UIN

Common Returns

GSTR-1 (details of outward supplies), due on the 10th of each month

GSTR-2 (details of inward supplied) due on the 15th of each month

GSTR-3 (monthly return) due on the 20th of each month

Compounding taxpayers must file GSTR-4 every quarter, on 18th of the month next to the quarter.