GST AND DONE SET OFF BY MISTAKE

Krishna (Employee) (59 Points)

15 March 2019  
I have paid IGST by mistake and filed GSTR3B by declaring the same as liability but actually the same was not payable.
eg . Sales RS. 1000
CGST PAYABLE RS. 90
SGST PAYABLE RS. 90

I have also shown IGST by mistake RS. 90 with CGST and SGST and made set off of the same and filed GSTR 3B

My question is that what should i do? whether to claim ITC of the same or to pay and declare less tax in next return??

in next return there is no possibility of IGST payment liability..