GST: From October 2022 period onwards it is mandatory to file: Previous period GSTR-1 before current period GSTR-1 and Current period GSTR-1 before current period GSTR-3B. (03.11.2022) Leave a Comment / Daily Updates / By Team Bizsol GST From October 2022 period onwards it is mandatory to file: Previous period GSTR-1 before current period GSTR-1. Current period GSTR-1 before current period GSTR-3B.