The deduction entered should be listed on Schedule A line 16.
If you take the Standard Deduction, rather than Itemize, the deduction will not be recognized.
If it was repaid in the same tax year, the employer should have corrected your W-2.
If it was repaid in a following year, and if you do not itemize deductions, you might want to consider taking the tax credit instead.
The tax credit can only be done using TurboTax Desktop.
Here is a link with more information.
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