GST query on B2C amendment and voluntary payment through DRC-03

Prashant (abc) (66 Points)

02 September 2021  

Hello,

I mistakenly filed B2B as B2C.

Later I have amended (Dec 2020 invoice) B2C to B2B but forgot to reduce the invoice amount from table 10. 

Also I didn't mention next month's(Jan) invoice in GSTR1B. How can I rectify this? 

Another query is that I failed to file GST for April 2021 but then later I paid it voluntary GST using DRC-03 in May 2021 but till now it is not processed by the Tax officer. Please help me in this regard.

Regards.
Prashant