I can't edit real estate tax

@dih3 

Pre-filled with a "$0" ? .... AHHH...

If it has an actual "zero" next to the $ sign, that means there is a "Supporting Details" sheet attached to that field.

1)  In 2018 you added "Supporting Details" to that entry...probably to describe  when & how paid.

2)  The Supporting Details sheets transferred into your 2019 file (but they get emptied of $$ values during the transfer to the next year).

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.  (desktop Software Bug in my opinion..reported last year too)

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 SuppDet worksheet and then make your normal entry.....or...

4c)  One can also enter the proper $$ in the actual Worksheet in "Forms Mode"....if you cursor-drag hi-lite the $0, and then hit the "Forms" icon at the top of the screen, the actual worksheet line with the $0 will show up in Forms Mode. ...when attempting to enter any amount on that worksheet line, the SuppDet sheet pops up right away when you try to make an entry.

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and the are other places ..like Medical Expenses, "Federal" Estimated Tax payments and (as you noted) Property tax payments...where the same "$0" issue may pop up in the interview.