What is the deduction that you are trying to make? There are a few different things that can go on Line 25600.
To claim other deductions on line 25600:
Click on other deductions on the left side menu
Click continue on all the pages until you reach the "Additional deductions" page as seen in the following screenshots:
TurboTax Online
TurboTax Download/Desktop
I hope this was helpful
I have clicked through the entire deductions screen, maybe blind but never came across 'Additional deductions' options. Not available in the find as well. Intuit, if I can't enter a simple line from an established tax form, my confidence in your product is sorely tested. Perhaps the ability to enter line 25600 is outside of the parameters of the product - if so, why was this not specified in the purchase sheet. Finally, why on earth can I not simply go to the forms and enter into 25600 on the online version?