Gstr 1 quarterly filing

Mehul Jain (Deputy Manager at Deloitte Haskins & Sells)   (30 Points)

21 December 2017  
In case my turnover is below 1.5 crores i need to file GSTR 1 quarterly from July to September,However in case i have filed GSTR 1 for the month of July, for what period should i file quarterly GSTR 1 July to September orAugust and September?