There are some anecdotes, bad stories about Social Security checks but since 1938 SS has been considered a legitimate Income Tax by the Supreme Court. I checked out the case at the library and it is true.

If there is no association to Social Security though, you can make your demand on the agreement. On the agreement you simply sign responsibility for any tax liability. Good thing you had your stamp handy when you withdrew your retirement! Now you have no tax liability. You signed your demand, not agreement to have a tax liability. Your demand released you from the tax liability.

I saw a new stamp the other day, on the front of the bills: