What is the process for deleting or modifying an invoice on BUSY after filing the GST return?
Once GST return is generated from BUSY and uplaoded on portal and filled you must take care of given steps
Step 1 Not recommended to make changes in invoces
Step 2 And no amendments can be directly done from BUSY and same have to check on gst portal
Step 3 Can issue credit notes against invoice to show effect after consulting to your tax professionals