If Tax Calculation Country is set to Other on Inogic settings then tax calculation is done depending upon the tax schedule set on Product.
On product entity, under the Tax processing tab there is ‘Tax schedule’ field wherein you can set the tax schedule according to which the tax will be calculated.
Now, if you are to create an Opportunity and add products then tax will be calculated on the basis of Tax Schedule defined for that particular product.
Similarly, you will get ‘Tax Processing’ tab which will give you detailed information about the tax calculated. Here also you will see the ‘Tax Schedule’ field. You can set this field as per your preference.