What data fields are mandatory in BUSY when generating an e-invoice GST number, PIN code etc?

The details you need to enter before generating an e-invoice in BUSY are as follows.
 Make sure that you have Generated Registered GSP credentails from Govt. portal of EWay Bill 
 Step 1. Now Go to Administration menu then click on Configuration option. 
 Step 2. Now click on Features and options then click on GST/VAT button. 
 Step 3. Now Enable the E-Invoice option and click on configure button. 
 Step 4. Mention the From Place and its corresponding pincode on the E-invoice configuration page, and then click on the Save button. 
 Step 5. Click on the GSP Configuration button and select the GSP for E-invoice. You have the options to choose from Automatically, Webtel, or Pinnacle. 
 Step 6. After selecting the GSP, provide both the GSP username and its password. Then, click on the OK button to save this configuration. 
 Step 7. Now Go to Voucher series Configuration from Configuration under Administraton menu. 
 Step 8. Then Click on Sale voucher type and expand the sale button then select the series. 
 Step 9. After series selection click on voucher configuration button and enable the option Generate E-Invoice after saving selected as Y. 
 Step 10. Now Go to Transaction and make an sale invoice with proper information then click on save button to save the invoice. 
 Step 11. Then a Transport window open and you need to define Transport Name with its GSTIN or Vehicle Number. 
 Step 12. Enable the option E-invoice required selected as Y and select the mode of transport as Raod then select automatically in Sub Type and Transaction Type. 
 Step 13. Now Click on Ok button to save the invoice and software prompt you to Generate E-Invoice. 
 Step 14. Then click on Yes button to generate the E-Invoice and select the method to Generate E-Invoice such as Automatic, JSON, Plain Excel. 
 Step 15. Now Click on Automatic button to generate and enable or disable the rest option as per you need then press Ok button. 
 Step 16. Now click on check possible error button to check the error if any pending otherwise click on view and geneate e-invoice button. 
 Step 17. Now you will get an window which have complete e-invoice required information and click on Generate E-invoice button. 
 Step 18. Then E-invoice Acknowledgment number generated successfully and it will auto put in E-Inv. Ack number field.