Filing GST as IGST (for Inter-State) though invoice is made as CSGT & SGST by mistake

Seram Baris (3 Points)

07 July 2021  

I provided an B2B invoice with CGST & SGST to my customer (GSTIN of another State) by mistake. I thought it would be same State as I am supplying goods within my State though GSTIN of my customer is another State. I see this mistake when I try to file GSTR1 of the invoice while choosing POS(place of supply).

So my question is:

 Is it okay to file the GSTR1  of the invoice as IGST (correct one) though the invoice is incorrect ?

OR, Should I file it as incorrectly and amend in next month? (I am not sure if this is possible).