You can't snap a photo of your W-2 in TurboTax Online, nor can you upload a photo you took with your device's camera.
However, you can take a picture via the mobile app, which will then upload to TurboTax Online.
Please see below for more information:
https://ttlc.intuit.com/replies/4875306
This year we've made importing your info
into TurboTax easier than ever before! You can successfully import your info
directly from your employer.
Please see the below TurboTax FAQ:
https://ttlc.intuit.com/replies/3389204
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