Please explain first what you mean by "messed up tax return," and tell us if you have already filed it and if it has been processed by the IRS. Sometimes people incorrectly say they want to "amend" when all they mean is they need to make corrections to a return they have not yet filed.
What tax year? What is the mistake that needs to be fixed?
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**