The problem with the tax withholdings is that it might only be worth $2/month to you (as it saves you using your excel or whatever) but to the provider they kin

The problem with the tax withholdings is that it might only be worth $2/month to you (as it saves you using your excel or whatever) but to the provider they kind of have to provide a very robust calculator and probably assume some liability. So they'd want much more than $2 I would assume. They'd need 2k-10k users to make a living, thats a lot of support also!