I want to check if my e-invoicing setup is correct. What validation can I do?

To check if your e-invoicing setup is correct, follow these steps: 
 Step 1: Configure e-Invoice by going to Administration, then Configuration, and selecting Features or Options. Choose GST or VAT and enable e-way bill as required. Enter relevant details like place, pin code, etc., in the configuration window. 
 Step 2: Click on GSP configuration, select the GSP for e-way bills and e-invoices, and enter Webtel and Pinnacle's user ID and password. Click on validate to verify the credentials. 
 Step 3: Generate Webtel and Pinnacle's ID and password from the E-way bill portal. Log in to https://ewaybillgst.gov.in/, click on login, enter E-way bill login and password, go to Registration, select For GSP, send OTP, verify OTP, and create the user for Webtel and Pinnacle. 
 Step 4: Ensure that Voucher Series Configuration is set to generate an e-way bill after saving. 
 Step 5: Verify that the QR code print option is enabled in the Sales invoice bill print option. Enable Print E-invoice IRN, Ack. No., Act Date & QR code from Administration, then Configuration, then Invoice/Document Printing. Find your Sales Invoice, whether it is Standard or Advance, and enable the option accordingly. 
 By following these steps, you can ensure that your e-invoicing setup is correct, including the validation of GSP IDs.