If you filed your 2017 Tax Return but never received your refund, you will need to contact the IRS at 1-800-829-1040, (when the government reopens).
You can also check your IRS Tax Account online to see if they show that you owe taxes by clicking this IRS link: https://www.irs.gov/payments/view-your-tax-account.
If your 2017 refund was offset for a federal debt, back taxes, or child support, you should have received a letter from the IRS stating the offset amount and who it went to. If not, you can contact the Bureau of the Fiscal Service (BFS) at 1-800-304-3107 to check with them about offsets on file for you.
If you are unable to get things resolved with the IRS directly, you can contact the Taxpayer Advocate by clicking here: https://www.irs.gov/Advocate/The-Taxpayer-Advocate-Service-Is-Your-Voice-at-the-IRS . The Taxpayer Advocate is there to help you deal with the IRS when you are unable to get things straightened out on your own.
Finally, if it is your State Tax Refund that you are missing, you will need to contact your State Tax Office directly: State Tax Office Contact Information.
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