If you want to upload invoices in GSTR-1, you can upload them before the 10th of the succeeding month. The last date for GSTR-1 filing is the 10th of the next month. For example, for filing July's month,the last date for filing will be the 10th of August." with "If you want to upload invoices in GSTR 1, you can upload them before the 10th of the succeeding month. The last date for GSTR 1 filing is the 10th of the next month. For example, for filing July's month,the last date for filing will be the 10th of August