GSTR3B revise time error

How to you revise your GSTR 3B return...?

once you submite GSTR 3B you can't change any of this return of any change it will be rectified in GSTR 1,2&3

IT IS OPEN TO MAKE CHANGES IN GSTR 3B  FOR THE M/O JULY IF RETURN FOR THE SAME NOT FILED BUT ONLY SUBMITTED SO HERE IS THE TIME TO CHANGES ON GSTR 3B FOR THE M/O JULY AND SAVE AND SUBMIT 

THANKS !!

But submit button not appearing , Due to this we are unable to file our August return and govt. charging penalty continuosly , As per news channels 50 lakh returns are pending due to glitches of GST portal but govt. charging 200 per day means 50,00,000*200= 1000000000/- per day revenue just from late fees , Is it acche din ??? All bunisses facing lots of liquidity problem due to RCM/Advance receipt tax /interest / penalty. Just due to the dictatorship of our govt.