Taxpayer ID and Income tax details approvals issue

I am working on a requirement to have Supplier Internal change approvals for Taxpayer ID changes only for this
I have enabled Opt-in feature required at suppier level : Opt-in feature : Organziation details and Income Tax details.
As per documentation Income Tax details changed is "header level attribute"

Taxpayer ID is at the tax identifier level

In the application basically Taxpayer ID is under Income Tax details
here we want to have to Approvals for Taxpayer ID but not for whole Income Tax details changed. I did apprvoals set up like
Income tax details changed : Yes —> Auto approve
Taxpayer ID Changes to Yes —> Approval group.