B2B INVOICE AMEND

mukund (manager) (480 Points)

06 June 2018  
I want to amend the sale bill of April 18, as GST no is changed, and bill amount is changed, but the bill no is same , but I am not able to amend the same as I write the new GST no , name of the party remains the old one and system ask for new invoice no.
so how to amend?