How to add tax code into Receivables/Payables' journal description

Summary:

I want to add tax code in Receivables/Payables' journal description, but I don't find any source for tax code in Manage Description rule of Payables/Receivables. Pls kindly show if you know which source should be used.

In addition, in case there is no source for tax code, I want to use source tax rate name, but it seems can only apply for accounting class "tax", but can not apply for other accounting class (for example receivables, revenue, liability, expense…). Is it possible to add tax rate name into journal description of other accounting class of Receivables, Payables?