That will work. Until you have saved a particular tax file from within TurboTax on a particular computer, it won't appear in TurboTax's list of tax files you've worked on on that computer, so you'll have to open it by browsing to the file location in the Dropbox folder. As a precaution, though, you might want to occasionally make a backup copy of the file, but that's probably good practice even when using only a single computer.
