Deductions & credits

Federal tax offsets for child support are administered by the Bureau of Fiscal Services and always send a letter informing you of any tax garnishments filed against you.   They can tell you if there is a tax offset files against you.   
<a rel="nofollow" target="_blank" href="https://www.fiscal.treasury.gov/fscontact/fs_contact.htm">https://www.fiscal.treasury.gov/fscontact/...>

For the state, you would have to contact the state.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**