To link an e-invoice generated in BUSY to an e-way bill, you need to generate an e-invoice and an e-way bill together to link each other's e-way bill with the e-invoice and the e-invoice with the e-way bill. For this, you need to enable the option E-way bill generate within the e-invoice as Yes, for this, you need to follow the below steps:
Step 1: Go to the particular sale invoice bill from the transaction option, and in that, you will get the transport window. In the transport window, specify the e-way bill required and the e-invoice required as yes, and the e-way bill generated within the e-invoice Also, click Yes and fill in the relevant information for e-way bill generation and e-invoice generation, then click OK.
Step 2: It will link the e-invoice with the e-way bill.