If you had your TurboTax fees paid from your federal refund, the fees plus a $40 charge for using that service will be deducted from your refund amount shown on your tax return. You can see what your fees were by using this link:
If you did not use that service, then the IRS may have offset some of your refund for a specific reason. Here are some of the reasons refunds are offset: https://taxpayeradvocate.irs.gov/get-help/offsets
You should receive a notice from the IRS within a couple of weeks explaining the reason for the offset.
