Tax prepayments we have already made. they are more than my current tax bill

Yes - If you are referring to quarterly payments of estimated taxes.

To report the quarterly tax payments you made, please follow these steps:

1. Click on Federal Taxes >  Deductions & Credits.  [In TT Self-Employed:  Personal > Deductions & Credits]
2. In the Estimates and Other Taxes Paid section, click on the Start/Update box next to Estimates. [See Screenshot #1, below.]
3. On the next screen, select the category for the tax payment (Federal, State, Local).  [Screenshot #2]
4. You can enter the payments you made on the next screen.