TWO BUTTON E-INVOICE PREPARATION IN VFAS OPEN THE BILL CLICK ON Einv JSON button json file will be exported open the einvoice portal as shown below click on bulk upload select the file from einv_2021 folder in your vfas data folder click the upload button click the download excel button goto bill screen click on Read IRN button vfas will read the downloaded file and save IRN, Ack.No,Ack dt, Eway bill NO