Tax Category is not defaulting while invoice creation.

We have defined the section code 194Q, as per standard setups.

Then for 194Q we have defined categories like 0.1%, 0.01%..etc

We have attached the above section code as well as categories with the concerned suppliers.

When creating an invoice in payables we expect the section code and as well as tax category should default but the section code is getting defaulted, and category is not.

Please help how the tax category can get defaulted while booking the invoice.