TurboTax allows you to enter in your full details. However, the IRS requires you to select either the standard deduction or itemizing deductions.
TurboTax needs all the details to optimize your return by taking the best option and will automatically exclude the extra information.
Be sure to select Continue in the bottom right of the screen. Do not select Change Deduction in the middle of the screen, or it will revert back to the lower refund/higher tax option.
For more information about the difference between the Standard Deduction and Itemizing Deductions, see: Video: What is a Schedule A: Itemized Tax Deductions? - TurboTax Tax Tips & Videos
How does the Standard Deduction differ from itemizing deductions?
