To Recurring billing SaaS. Want to win more customers incorporate TAX

I've been going through lots of recurring billing services trying to find the best one. I've tried Recurly,Chargiy,Spreedly, and Chettargetter. None of which incorporate tax in some sort of useful way for us. Their instruction are to create a product for each tax, That is just way to inconvenient for us. The company that incorporates taxes will win the product comparison every time, unless you are way overpriced. Please implement tax! It would be awesome if you did.