Please check the tax calculation based on percentage.
Maybe it's something in the configuration that I'm doing wrong if so please let me know what.
Thanks in advanced.
Kindly share Tax and Charges Template to see the configuration.
Sales Taxes and Charges Template:
Details for "IVU State":
Same for the other tax.
I think you have entered wrong tax rate in "Item Tax" table which is inside the Item record. Thats why while calculating tax amount, it is taking 0.105% instead of 10.5%.