When trying to print bills, I find that the IOM number does not appear even though it should. How can I fix this issue?

When trying to print bills, I find that the IOM number does not appear, even though it should. How can I fix this issue?
To appear, IOM number your in bill from the BUSY. You need to check the below steps:
Step 1: In BUSY, it does not have any specific number of IOMs.
Step 2: If you want to add a printed bill, you need to configure it in the optional field of the particular sales invoice voucher.
Step 3: To enable this option, go to Administration, then Configuration, then Voucher Series Configuration.
Step 4: After the Voucher Series configuration, select the sale option, go to the particular series, select the Voucher configuration, and enable the optional field for the IOM number.
Step 5: Specify the relevant information about the data filed and save the information and configuration settings.
Step 6: Then it will come automatically in your standard format.
or
If its design format is something you need to change in your designed advance format, you need to follow the below option:
1. To change the setting in the exiting advance format, you need to contact your local partner or dealer of BUSY because its chargeable setting is BUSY. If the local partner or dealer of BUSY is not able to do this,
2. Then we can do it while BUSY on a chargeable basis.