Difference in Tax Liability compare to 3B &R1

vinay joshi (83 Points)

13 September 2019  
Hi all,
In FY- 2018-19 by wrongly we have less declared tax liability Rs 10,00,000/- in gstr-3b. 3b filed upto Mar-19 month. But gstr-1 is pending.
Now how to pay the difference Tax liability?
can we pay in 2019-20 returns(3b) or
DRC-03 FORM?

THANKS IN ADVANCE­čÖé