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There was some other kind of adjustment on your refund amount; the max fee is $320.  If the IRS adjusted your return, they will send you an explanatory letter or notice.   See IRS Reduced Refund.

There are a few reasons why your refund might be less than what was shown in TurboTax:

• The IRS reviews the information you entered in your return and compares it with what they have in their database. If there are any discrepancies, they make adjustments accordingly and send your reduced refund.  The IRS will send you a letter explaining the adjustment, but it usually takes about three weeks to arrive. If you got your refund already, check the IRS Where’s my refund? site to see what they adjusted and how it impacted your refund. It may take several days for the site to be updated.
• When you pay your TurboTax fees with your federal refund, the TurboTax fee plus a separate Refund Processing Service (RPS) fee are deducted from your total refund amount. So your IRS-issued tax refund might be less than the amount shown in TurboTax.   The total cost of the TurboTax fee and RPS fee combined can be anywhere from $39 to $320.
• A refund offset is when the IRS applies part of, or all, your refund toward past-due income tax, child or spousal support, student loans, or state unemployment compensation debts. If this happens, check the IRS Where's My Refund? or the Bureau of the Fiscal Service site for more information.   You’ll also get a letter explaining why you didn't get your entire refund.  

 See Reduced Refund - IRS