I have had the little box on the top page of my Amazon Seller account that says I need to provide my tax information. Now, I disregarded it because I never thought I would hit either the $2000 in sales, or 200 transactions. Well I have passed $2000 and am about 40 transactions away from 200. Do I still need to register? Is this something that is really only said by Amazon due to the law and they don't enforce it, or...?