This is a known issue. That Schedule C, Part V section can be kinda finicky in Forms Mode. Read this whole answer below
first on how to correct that section to edit your 2017 transferred-in expenses. Some of this answer may not
specifically apply to your situation since it was written to cover several circumstances. But when you read the overall
answer, you'll understand how things flow in that section and how to get
it corrected.
The important part is to not make the edits or
entries on the actual Schedule C, Part V itself, but to preferably use
the Interview Mode (step-by-step), or secondarily the new Schedule C
Worksheet explained below. You CANNOT correct it on the actual Sched. C, Part V itself. You'll get the weird behavior you mentioned if you try.
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Transferred-in expenses that come in from 2017 or any new expenses that
you entered from the Interview Mode cannot be edited directly
on the
actual Schedule C, Part V in Forms Mode. Those
expenses are actually being pulled from the new Schedule C Worksheet. When you are in Forms Mode, in the left-column forms list it is called Schedule C Wks.
The expenses can
be edited either on the new Schedule C Worksheet or preferably in the Interview Mode
(step-by-step mode). And when edited/entered in one of those 2 places, it
"should" flow to all 3 places correctly. If you try to edit it on the
actual Schedule C, Part V, however, you'll experience bizarre
behavior with
uneditable fields or fields that move around, etc.
While in Forms Mode, look in the left column list of forms, and select the Schedule C Worksheet
(may be abbreviated as Schedule C Wks). On the Worksheet you can
scroll way down to "Miscellaneous Expenses", and then in that subtopic
scroll further down to "Other expenses." You should be able to
edit/delete any transferred-in 2017 expenses there on the Worksheet. Then check the Schedule C, Part V
to be sure your changes flowed correctly to the Schedule C, Part V.
The
other way (and the preferable method) would be to use the interview mode
(step-by-step) to edit the 2017 transferred expenses. Other
Expenses entered from interview mode flow first to the Schedule C
Worksheet, and then to Schedule C, Part V.
Here is another oddity, and is problematic:
Surprisingly, it MIGHT let you enter a new expense directly on Schedule C, Part V, but a new expense should
NOT be entered there. If you enter a new 2018 expense there directly on
Schedule C, this new expense does NOT flow correctly backward to the Schedule C
Worksheet, and it does not flow back to the interview screen in
Interview Mode. So it can create discrepancies.
So for your expenses in Part V you can edit them either
on the Schedule C Worksheet or (preferably) in the Interview Mode. A
new or edited expense entered in the
Interview Mode does appear to flow correctly to both the Schedule C
Worksheet
first and then to Schedule C, Part V.
I would recommend all entries and edits for Schedule C Part V
and all new "other expenses" be done in Interview Mode to assure that
everything flows correctly, with the Sched C Worksheet as a second choice. In any case, once you have corrected and entered all "other expenses", review them in all 3 places---the
Interview Mode screens, the Schedule C Worksheet, and the Schedule C
itself--to be sure all has flowed correctly and that it is consistent in
all 3 places.
And when all "other expenses" have been edited and entered, verify that the total of your "other expenses" is correct on your Schedule C, Line 48 and Line 27a.
