Why is tax calculation incorrect in Shopify POS?

[JeromeNamnam]

Hi,

I'm about to launch my store in few days. And I'm fixing all issues I can find.

here is one which is really bothering me:

Price when removing taxprice when not removing tax.

Following my shopify tax configuration I do expect that if I remove tax from my product. price when tax is disable become 16,52€ and not 19,99 with or without. this is non-sense to me.
If in shopify settings, the following box is ticket:

"All prices include tax Taxes charged on shipping rates are included in the shipping price."

I do expect a behaviour from shopify to deduct tax from 19,99 and not consider that 19,99 become a exVAT price.

In the meantime, ... boring solution is to import export all my price and /1,21....

I really hope to have feedback from you guys before 1st of February.

Jé