GSTR-1 V/S GSTR-3B DIFFRENCE TAX LIABILITY.

Dear Sir....

We are filled Quarterly filling in the month of GSTR-, EX- GSTR-1 tax amount is 100 rupees, then GSTR-3B filled 80 rupees tax amount in the month of July 80 rupees so how can solve balance tax amount in GSTR-3B?