If you need to correct data after E-invoice generation, follow these steps:
Step 1: Go to Transactions, click on Modify, and select the invoice you want to edit.
Step 2: Edit your invoice, but note that it will not reflect in your E-invoice.
Step 3: E-invoices cannot be edited. You can cancel the voucher with the E-invoice, then generate a new one with a different voucher number.
Step 4: To cancel the E-invoice in BUSY, press ALT+X after opening the voucher. When prompted, confirm the cancellation of the E-invoice by pressing Y, and then proceed with the cancellation.