It is a quite basic scenario about tax calculation. You just need to know about how the tax got calculated. You can search in forum about the tax calculation process.
If you will go for search in forum about the term "Wrong tax calculation in MIRO", then you will be able to get many discussions regarding tax calculation.
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I will not say, that these discussions can solved your issue. I am giving you the information to know the process of tax calculation. If you will know the calculation, then you can find the solution yourself.
***Edited by: Dibyendu Patra
