This is a very perceptive question.
There is not much to be lost by importing and seeing what the result looks like since you can prepare more than one business return in the TurboTax program.
If you decide that tax return does not reflect the activity or that too many adjustments are need all that is lost is the time it takes to import and work in that file. Just use a different file name for the import versus entered file.
Personally, import seems best when there are many categories of income and expenses that I want reflected on the tax return. Many times I can prepare a business return with less trouble and time by just entering the information rather than importing.
For more details on what can and can not be imported and how it works, see
"To import from Quicken 2010 or earlier, or to import into TurboTax CD/Download software for Mac, you must first convert the data to a tax exchange format (.txf) file." That extra step may be enough to sway you to enter rather than import.
"Instead of changing imported information, it's usually better to update the information in your financial program before importing.If you've already imported, you can re-import the information after you've updated it in your financial program (be sure to select the replace option when prompted)."
Importing is likely worth the time and effort even if you later decide to prepare a file just from entries rather than from import.
Please ask if you need more discussion or clarification.