Nil return gst late fee

Pls help me regarding this .

I applied for GST number and got it on January 29th, 2018.

But due to some circumstances, I am unable to start my business till now. Now all issues sorted out . I am going to run my business from next month ( September 2018 ).

Till now I have not filed nil return

Pls tell me how much do I need to pay the late fee

To avoid late fee, is it possible to cancel the previous gst number and re apply for a fresh gst number ?

For GSTR1 - how much late fee to be paid till now ?

For GST3 R , how much late fee to be paid till now ?

Pls help me .

Thanks in advance

Pls give your valuable suggestions