Where are the tax codes being sourced for Tax Rate Name in the Taxes section of Payables invoice

Summary:

Hi,

In the implementation the Tax Rate Code names have been incorrectly setup. The customer wants to change the Tax Rate Code names to help the user to understand which Tax code to pick up while creating the Payables and Receivables Invoice. I am unable to edit the Tax Code name in the "Manage Tax Rates and Tax Recovery Rates" page because they are greyed out. I made the changes in the ZX_INPUT_CLASSIFICATIONS and renamed the tax codes. e.g. AUS Capital Purchases GST 10%" in place of "AUS_G11_STANDARD_10%" but the changes are reflecting only at the Tax Classification field in the