Why am I unable to charge customers tax at checkout?

[Elliotco]

I am trying to have taxes taken out at check out and under the products I am clicking the box that says “ include taxes”. However, it is showing the amount of taxes and taking it out of my profits but it is not actually charging the customer. When I unclick this box it doesn’t say anything about taxes at all. Either way I go it is not charging my customers taxes. I want tax amount to show up at check out with shipping cost and be added to the price. What am I doing wrong?