Itemized Deductions

I am sorry, we are not able to see your TurboTax screen to see exactly what is going on.  You may want to try rebooting and restarting TurboTax.  

@joerh    IF you are using Windows DESKTOP software, and you see a "$0" there in the problem field, and not a simple "$" ......probably this software bug:

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Whenever you see that "$0"  (an actual zero, and only when using the desktop software )...a "Supporting Details" sheet is attached to that entry, usually transferred in from last year, but after the actual $$ entries were stripped out.

Problem is that TTX reprogrammed that page such that the "Supporting Details" page doesn't pop up like it used to...so several ways to work around  it until they get it fixed (if ever...reported a couple years ago and no action).

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Here's what I think is happening  (#1,2,3 below)...and how to fix it (#4 below).

1)  In 2018 you added "Supporting Details" to each of those fields where you encounter a locked "$0"...probably to describe  when & how paid it in some prior year.

2)  The Supporting Details sheets (empty) transferred into your 2019 file from your 2018 file.

3)  The Supporting Details are supposed to pop up as soon as you attempt to enter a value during the Interview...but it doesn't.  (Software Bug)

4) Workarounds  : 

4a)  double-click in the field and the Supporting Details sheet pops up and you can either delete it (hit the big red "X"), and now make an entry...or you can use the SuppDetails worksheet to enter your $$....OR...

4b)   Put your cursor in the box, and then go to the top menu on the screen and click on <Edit....then <<Add Supporting Details from the drop-down menu.  IF the SuppDet box shows up you can either add your entry in there...or hit the Red "X" to delete the whole SupDet worksheet and then make your normal entry.....or...

4c)  Put your cursor on the box....switch to Forms Mode...., and enter the payment  directly in the worksheet.   You can also delete the Supporting Details sheet entirely (look for the REMOVE "X" when it pops up)..once that is done, you can make entries using the interview again..

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and there are other places ..like Property Taxes, and Federal Quarterly Estimated Tax Payments ...where the same "$0" issue "might" pop up....but only if you used Supporting Details in the past