I applied for cancellation of GSTIN Number on 30/07/2018 and got order of approval on 31/07/2018. Now, my question is, whether do i have to file GSTR3B for the month of July 2018 or not? as it's deadline is 20/08/2018 and i don't want to end up paying late fees. Also, whether do i have to file GSTR1 also for the quarter of Jul-Sept 2018 at that time as i have filed GSTR3B for the month of July which was NIL. Also, i found out that we need to file GSTR-10. I want to know how to file it through GST Portal as i can't see this one.