As per Government norms, once an E way bill is generated, it cannot be edited or modified the quantity from BUSY. However, you can check the modification provision on the official E-way bill portal. Further if the E-way bill is generated with incorrect information, You can be cancelled and then generated afresh.
In BUSY, we can cancel the E way bill with the invoice.
Please follow the below step to cancel E way bill from BUSY :-
Step 1: Go to transaction
Step 2: Click on required voucher type .
Step 3: Click on modify and open the invoice
Step 4: Press Ctrl+X shortcut to cancel invoice with e way and mention the remark for same.