Do changes on duplicate update on original?

[flyways]

If I create original tax form then make a duplicate copy for itemize, will changes on itemized duplicate transfer back to original?

[jtax]

I see you are using desktop software. The answer is no. If you copy the tax file and change the copy it will not change the original. Think of it like any other software (Pages, Word, etc.) but instead of a word processing file (say) here it is a tax file.

What I do in this kind of situation is that I wait until everything else is done. Then I copy the file and do whatever changes I wanted to do to see what happens. Then I can choose which on to go with. I am very careful to indicate in the filenames which is a draft, which is the final version etc. You can see the files like any other file in the Finder.