For july month i have not filed gstr 3b but i have submitted it in a nil return and now for august i can't able to submit it why sir

Respected Experts ,
Is it mandatory to raise self invoice for purchase from unregistered dealers ? Can we make RCM provision through journal voucher entry. Please guide.
Thanks

Sir/Madam,
can i have sac code for stitching (tailoring) job work

A civil Contractor provinding the construction services to Govt. He cannot raise the invoice since the tender amount is fixed. So how he can charge GST? Also whether Army will be covered under Govt.?

PETROL EXP, SALARY OTHER EXPS. SHOWS IN GSTR 3B YES OR NOT?

PLEASE URGENT REPLY

Rcm on textile business:

Weather rcm is applicable on opening stock held on 1 July. This is purchase before application of gst and exempt in vat but now cover in gst @5%.If person cover in composition in gst than plz suggest me weather rcm is applicable on this stock or not.

Dear sir,
We paid tax on freight on RCM basis
Now in gstr2 which table we fill that detail to avail credit

DEAR ALL

KINDLY TELL WHETHER I NEED TO MENTION ALL EXPNESES IN GST RETURNS WHETHER THIS IS SALARY, ELECTRICITY EXP. BANK CHARGES , BANK INTEREST, GOVT. FEES LIKE APEDA FEE, ECGC EXPENSES.THANKS IN ADVANCE

Dear sir / ma'am if a person opted for composition scheme and now he is providing services. so it means he is violating the law or not? and how he will file gst return? Please clarify all related provision for this situation. Thanks

Dear Sir/Madam
My Client registered in Uttranchal state.In the month of July-2017 He received Goods from Delhi by transport. Transportar of Delhi issued a bilty to pay freight.My Client made some payment by NEFT and Some made by Cash to truck driver.On this transaction what should be pay either IGST or CGST+SGST ag. RCM