Some Turbotax PDFs contain "all forms and worksheets", and that includes a lot of Turbotax worksheets and documentation. The official pages of your federal tax return contain an "OMB number" in the top right corner.
It may be harder to identify the state tax forms, you may have to check with your state. Certainly, any page with a Turbotax logo is not part of your official tax return. And note, some states may include a copy of your federal return -- for example, if you file by mail in Virginia, I think you need to include a copy of your federal return along with the state return, so the PDF from turbotax will contain a second copy of the federal return. If you are only saving copies for your records, you probably don't need the second copy.
