You cannot upload a PDF to the TurboTax online edition tax returns.
See this TurboTax support FAQ for importing or entering a W-2 - https://ttlc.intuit.com/community/entering-importing/help/how-do-i-import-or-enter-my-w-2/01/26253
See this TurboTax support FAQ for taking a picture of a W-2 - https://ttlc.intuit.com/community/entering-importing/help/how-do-i-take-a-picture-of-my-w-2-in-turbo...
See this TurboTax support FAQ for uploading documents to My Docs™ - https://ttlc.intuit.com/community/entering-importing/help/how-do-i-upload-documents-to-my-docs/01/26...
