If you are using TurboTax Online, you would have to pay to print (not e-file) to review Schedule C, Form 8829, and all other forms/schedules/worksheets: How do I print a copy of my TurboTax Online return before filing?
If you are using TurboTax Online and don't want to pay to print, you will only be able to preview Form 1040: How do I preview my TurboTax Online return before filing?
If you are using TurboTax CD/Download, you could switch to Forms Mode Windows (Forms Mode Mac) to review all forms/schedules/worksheets.
