How can I remove "Estimated Taxes" on draft orders?

Hi, I currently charge tax for 7 states. I want to remove estimated taxes on draft orders, because it confuses customers who are in the other 43 states that do NOT have to pay taxes. They will sometimes see the added taxes on their total and just abandon the cart. On top of that, the total with the “estimated taxes” is higher than what I quote them. How can I remove the “Estimated taxes” field on Shopify draft orders, until they fill in their shipping address with an address that we charge taxes on?

Thanks in advanced!