Process Copy Lines Copy Lines: This Process is used to create the same line details from one document to another document.Post E-Invoice Post E-Invoice : Process will help you to post the e-invoice & e-waybill to the GST portal 1. Validate GSTN : The button will help us to validate the buyer's GSTIN and that their details are correct before post the E-Invoice.2. Generate E-Invoice & Eway : The button will post both e-invoice and e-way bill to the portal3. Generate E-Invoice only : The button will post the e-invoice only to the portal.4. Generate E-Way Bill : The button will post only the E-way bill.5. Generate E-Inv & Eway(Part A) : This button will post the E-Invoice and the e-waybill Part A section only.6. Generate E-Way Bill(Part A) : This button will post the e-waybill Part A section only.7. Copy From GSTN : This button is used to copy GSTN Data From Portal. Add Default Items Default Items: This process is used to add the default charges to add in the invoice line.