How to get taxes incorrectly withheld refunded

[cyn_d_my]

My income type changed from a retirement pension to workers compensation. How do I amend my taxes to get a refund of taxes paid in?

[Critter-3]

Simply file a return for the refund of the excess withholding. 

[xmasbaby0]

Your post is confusing---provide some details.   You mentioned needing to amend.  What tax year do you need to amend?  Amending is a special process you use if you have already filed a tax return and it had mistakes or missing information---so after the IRS processes your original return, you send in a special tax form called a 1040X to make corrections.

You were receiving a pension, and then workers compensation?   Was tax withheld from the pension?   You do not even enter workers compensation on a tax return since it is not taxable.   

Please explain what income you received, when you received it, and what you are trying to amend.