Can anyone advise how taxes work in Webflow?

My client has an Ecommerce. He wants to add tax to the price of the item. He only sells the item in the US. I have enabled automatic addition of tax to the price and it is working.

But I am facing the following problem. Taxes are calculated based on the specified state. But if user enters wrong state name, then tax will not be added to the price.

Question: is it possible to make a drop down list of states in this field: Screenshot by Lightshot and user can select his state. Does anyone know how this can be done?

Thanks, and have a good day everyone)!