What is the purpose of einvoice feature in BUSY Accounting Software? Can you please explain how to perform the replacement entries? How can I view the bifurcation of the transmission side? Can you provide guidance on how to perform a check regarding this?

To make an e-invoice in BUSY Accounting software, you can follow the steps mentioned in the software's documentation. If your turnover exceeds 5 crores, it is mandatory for you to generate e-invoices,please follow below steps:
Step 1: First you have to create a GSP (GST Suvidha Provider), you need to visit the eway bill or e invoice portal and select Webtel Electrosoft Private Limited and Pinnacle Finserv Advisors Private Limited as the GSP Vendor type.
Step 2: Go to Administration and click on configuration.
Step 3: Select Features / Options and click on GST / VAT, here you will see a option called "E-Way Bill / E-Invoice Required.
Step 4: Set Y to turn it on and mention your place and pincode and GSP username and password in GSP Configuration tab and save the configuration.
Step 5: Go back to Administration and click on configuration.
Step 6: Choose the Voucher Series Configuration option and select the voucher type for which you want to generate eway bill and e invoice, such as sale, purchase, etc. Then, select the voucher series and click on Voucher Configuration.
Step 7: Here, you will see options of Input Transport Details, Generate "E-Way Bill / E-Invoice After Saving" , set Y to enable that. Now your BUSY is ready to generate E-Invoice & E-Way Bill Automatically.