Tax classification code from AP invoice line not defaulting for tax calculation

Hi Team,

I have the below two scenarios where tax is not calculating based on tax classification code value give under AP invoice lines

Scenario1:- We are entering tax exempt code in a expense report, then expense report is been imported to AP, I can see the tax classification code as 'CA GST EXEMPT' under invoice lines, however while calculating tax system is taking 5% GST tax rate instead of Exempt

Scenario2:- I am trying to enter a tax exempt for a AP Invoice Line. At line level, I did pass the 'Tax Classification Code' as 'CA GST EXEMPT' but I could see the system is calculating the tax on it. it is calculating the default 5% tax