Yeah, they do have a statement somewhere about those limits, but includes a statement that that the payments be made either thru tax withholding, or thru timely-paid quarterly Estimated tax payments. The part about the Quarterly estimates being paid in a "timely" manner is usually the sticking point form many folks.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
