To generate an E invoice in BUSY after completing the set up, you need to follow these steps:
Step 1: Go to Transaction menu and select the voucher type of which you want to generate E Invoice.
Step 2: Click on Add and enter all the necessary details such as date, Vch no., Party, Item, etc.
Step 3: Enter other details in transport details window such as Transporter, Vehicle no., Place, Pincode, etc and save.
Step 4: After saving the voucher a window will appear of E Invoice generation, select yes on it.
Step 5: Check all the details and generate E invoice and wait for the process. After that you can print E invoice.
Yes, you can generate E invoices for past invoice dates, but there is a time limit depending on your annual aggregate turnover (AATO). For more information about this you may consult with your CA or Accountant.