Unable to generate E-invoice for a service in BUSY. How to add correct tax category?

To generate an e-invoice for a service in BUSY and to add the correct tax category, you need to follow the below steps:
 Step 1: Go to the particular sale invoice bill, and in the selected item entry, you need to click Alt + M on item. It will open the item master window, where you will find the tax category, where you have to specify the service tax rate. Click on the tax category master name and press Alt + M, and then specify the type of service.
 Step 2: After confirming the tax rate, you need to enter it in your e-invoice transaction, then click on the save option, which will show the transport window. In the transport window, specify the e-invoice required, yes, and fill in the relevant information for e-invoice generation, then click OK.
 Step 3: After saving the invoice, you will get a dialogue box asking, Do you want to generate an e-invoice? Click Yes. After that, select Automatic Option, and then you will find the Automatic E-Invoice INR Generation Window. In that window, select relevant option Yes if required, or either skip by No.
 Step 4: After that, click on the OK option. You will get the check possible error option. Click on the check possible error option in this window. If you have any invalid transaction details, it will show you in red. You need to correct that invalid data by clicking on the red entry.
 Step 5: After checking for possible errors, you need to go to the Generate and Viwe E-Invoice option, where you will get a summary of the invoice, check the details, and then click on the Generate E-Invoice option. Your invoice will be generated.
 Step 6: After generation on the e-invoice, you will find the option to print the e-invoice. Click Yes 
 Step 7: After that, your e-invoice will be printed successfully, and in the sale invoice bill print format, you will find a QR code and an e-invoice ID, Ack. No., and Act Date.
 By following the above steps, you will be able to generate your e-invoice for a service bill in BUSY.