GSTR 1

Dear Ezhilvannan,
GSTR 1 for the month of July will be re opened only after completion of GSTR 2 due date i.e., 30th of November
So you can file GSTR 1 for July Month from Dec 1 onwards

GSTR 4 die date is 15th of November but the same was not available on GST Portal

File your GSTR 2 before due date i.e., 30th of November inorder to avoid late fee

As per the Press Release by GST Council on 22nd Meeting.
Taxpayers needs to file GSTR 3B on Monthly basis till December,2017

Below is the extract of the same

5. To facilitate the ease of payment and return filing for small and medium businesses with annual
aggregate turnover up to Rs. 1.5 crores, it has been decided that such taxpayers shall be required to file
quarterly returns in FORM GSTR-1,2 & 3 and pay taxes only on a quarterly basis, starting from the third
quarter of this financial year i.e. October-December, 2017. The registered buyers from such small
taxpayers would be eligible to avail ITC on a monthly basis. The due dates for filing the quarterly
returns for such taxpayers shall be announced in due course. Meanwhile, all taxpayers will be required to
file FORM GSTR-3B on a monthly basis till December, 2017. All taxpayers are also required to file
FORM GSTR-1, 2 & 3 for the months of July, August and September, 2017. Due dates for filing the
returns for the month of July, 2017 have already been announced. The due dates for the months of
August and September, 2017 will be announced in due course.