The different types of GST returns are; GSTR 1, GSTR 2, GSTR 2A, GSTR 3, GSTR 3B, GSTR 4 (CMP 08), GSTR 5, GSTR 6, GSTR 7, GSTR 8, GSTR 9, GSTR 9C, GSTR 10, GSTR 11, GSTR 12. Each return form has a different meaning and to get a complete view of when you should file which return, you can click types of GST returns.