interst in gstr 3b

Interst paid in August but didn't adjust in gstr 3b at dat time it was said that we can adjust it in gstr 3b but still gstr 3 is pending. so, is it ok if we show and pay interest of August in gstr 3b of January month ? and keep record in excel sheet of that we have paid interest of August in Jan? Or we have to wait for gstr 3. And we have filed gstr 3b of August in 5th oct so do we have to pay interest from 21sept to 5th oct ?Or till today ?