Taxpayer ID masking on Supplier Form

Hello -

Management has requested that the Taxpayer ID number be masked on the Supplier Form for all but one of our custom responsibilites.

In my research I am unable to find anyway to do this via the application as I did for the bank account number.  If we have to do it on the backend, does anyone have some good reference on the best way to do it?

Does anyone know if the Taxpayer ID can be masked?  If so, can it be masked for a particular responsibility or is it an all or nothing situation.

Thank you for your time and Happy Holidays!