Gst service export filled in nil rated

Ankit (None) (22 Points)

01 July 2019  

Hi everyone, 

I opted for GST in month of December as a exporter of IT services. 

From December 2018 to Feburary 2019, my earlier accountant filled GSTR-3B in "Nil Rated" category instead of  "Zero Rated Category" . 

My current accountant from February 2019 applied for LUT and filed GSTR3B returns correctly in "Zero Rated category". 

Is there any way to correct mistakes for GSTR-3B for month of december 2018 to February 2019 ? GSTR-1 were filled correctly in export invoices category. 

My current accountant is saying to generate credit note but he is also not sure about it.