I have registered on the e-invoice portal but invoices are still not getting generated automatically in BUSY after saving vouchers. What could be the issue?

To After registered on the e invoice portal but invoices are still not getting generated automatically in BUSY after saving vouchers, then you need to follow the below steps:
Step 1: Enable E Invoice Option:
Navigate to Administration in BUSY.
Go to Configuration and Go to Configuration and 
select GST VAT under Features Options.
Locate the E invoice Required option and set it to Y to enable E invoice generation.
Ensure that the GSP (GST Suvidha Provider) user is created in BUSY GSP Configuration and is selected for both E invoice and E way bill. Validate the webtel and pinnacle user credentials on the GSP Configuration window.
Step 2: Configure Sales Invoice Printing:
Enable the QR code print option in the Sales Invoice printing settings.
Ensure that Print E invoice IRN, Ack. No., Act Date is selected.
Step 3: Enable E Invoice After Saving:
In the Voucher Series Configuration, enable the E invoice after saving option.
Step 4: Generate E Invoice:
1. Open the specific sale invoice in which you want to generate an E invoice.
2. Go to the transport window and set E invoice Required to Yes.
3. Fill in the relevant information for E invoice generation and click OK.
4. After saving the invoice, you will receive a dialogue box asking if you want to generate an E invoice. Click Yes.
5. Select the Automatic option and proceed to the Automatic E Invoice INR Generation window.
6. Select the relevant options as needed and click OK.
7. Check for possible errors. If there are any invalid transaction details, they will be highlighted in red. Correct the invalid data.
8. Go to the Generate and View E Invoice option to review the invoice details.
9. Click Generate E Invoice to generate the E invoice.
10. After generating the E invoice, you will find an option to print the invoice. Click Yes.
11. Your E invoice will be generated, and E invoice details, including a QR code, E invoice ID, Ack. No., and Ack Date, will be printed in your sale invoice format.
Following these steps will enable you to generate E invoices in BUSY.