Can you give an example of which product(s) in the cart show the wrong tax?

I tried to add this product and it shows the following:

Image link: https://d.pr/i/CFogN9

This makes sense:
– price without tax: 86.96
– tax (15% of 86.96): 13.04
– TOTAL: 100

If you can give an example of where the calculations don’t match, we can check into it a bit more.

If you have further questions, please feel free to open a new topic.

Thanks.