<p>I noticed that IDOC requires you to sign all tax documents. If there is already a signature on the tax form (as in the signature when I was submitting the tax form), do I have to sign again somewhere else?</p>
<p>The signature on the copy should be fine. It is primarily for people who electronically file, and print a copy of the return. That return doesn’t have a signature, so you have to sign it when you give it to IDOC.</p>
<p>Like sign on the paper? O.o</p>