How to Make Mandatory for TAX filed in AR Transaction Lines

Hi,

We have a requirement to make the Mandatory filed for "TAX Classification Code" in AR Transaction Lines UI.

Can you please provide the solution to make the mandatory filed for "TAX Classification".

Note: We have followed below discussion, but this document making mandatory * mark, but it is not validating whether Tax code enter or not, without entering the TAX code also saving the transaction without any notification.

https://community.oracle.com/customerconnect/discussion/692323/how-to-setup-tax-classification-code-as-mandatory-in-transaction-lines-level

Thanks,

Koteshwar