How to calculate total late fees

I have not filled gstr3b from April to September, here are my problems.

1. no intimation was provided for me that I have missed fillings.

2. I have filled April as nil but from may onwards it's shows cgst 1510/- and sgst 1510/- total 3020/- I guess...

3.If I paid for may I don't know what fees will be for June late fees.

4. if total latr fees exceed 10k I don't want to pay and I want to close my get.

so can I know what will be my total late fees from April to September 2019