To resolve the issue of being unable to generate the e-way bill number for your invoices in BUSY, you can try the following steps:
1. Ensure that you have entered all the required details accurately, such as the transporter details, vehicle number, and goods details.
2. Check if you have a valid GSTIN and it is correctly entered in the system.
3. Verify if you have a stable internet connection to generate the e-way bill.
4. Make sure that you have the necessary permissions and access rights to generate e-way bills in BUSY.
If the issue persists, it is recommended to contact the customer support team of BUSY for further assistance.