By default Tax rate are occur on invoice

Dear Experts,

Tax Configuration:-

We are created two different tax rates codes  which is 17% & 19.5% under the same regime and taxes.

Set 17% GST rate code is by default but 19.5% Gst is not By default.

Problem:-

When user has select 19.5% tax rate code in tax classification field  system has by default calculated tax with the rate of 17%.

Expected Behavior

System should calculate tax on invoice line according to the given tax rate code.

Further Query:

In tax rate setup level why It is mandatory to set by default rate code.

Best Regards

Ayaz Iqbal