Your original question, before editing, said "with tax." This is probably equivalent to the phrases "including tax" and "price inclusive of tax." (This is the opposite of "plus tax.") Here is an example from the woocommerce online store software, which I found with a google images search:
As you can see, there is a settings prompt that reads, "Prices entered with tax." The corresponding radio button reads, "Yes, I will enter prices inclusive of tax."
Note, in my experience as a consumer in the US, the only situation that arises in everyday life in this day and age in which I occasionally make purchases without tax being charged, either explicitly or implicitly, is with online shopping. Sometimes the seller charges tax and sometimes not. Once a year I have to fill out my state tax declaration ("tax return"), and there is a question there that asks me to estimate how much money I have spent in online purchases. Then there is a calculation step to apply the state tax rate to that amount. This is where the state captures the lost sales taxes (lost to out of state online retailers).