I received an email from TurboTax stating that my W-2 from a previous employer was ready. When I log in, there's nothing. Why is that? I haven't gotten a mailed copy yet.

[xmasbaby0]

That was a marketing email to attract you to the software.   TurboTax does not receive your W-2.

Every 2021 W-2 that you received must be reported on your 2021 tax return, even if they are for small amounts.  Remember that each one of those W-2’s has your Social Security number on it, and that income was reported to the IRS by the employer.  You do not want to get in trouble with the IRS for under-reporting your income.

ALL of your W-2’s must be entered on the SAME tax return.  

Go to Federal>Wages & Income to enter a W-2.

After you enter the first one, you click Add Another W-2.

W-2's come from your employer, and they have until January 31 to issue it.  Some employers allow you to import the W-2 through the software, but for security reasons you still need information from the actual W-2 to import it.  You might need to phone, drop in, email and/or snail mail an old employer to make sure they know where to send your W-2.

https://ttlc.intuit.com/questions/2561916-how-can-i-get-a-copy-of-my-w-2

https://ttlc.intuit.com/questions/1934390-how-do-i-import-my-W-2

https://ttlc.intuit.com/questions/2588751-why-can-t-i-import-my-w-2

https://ttlc.intuit.com/questions/2938482-how-do-i-take-a-picture-of-my-w-2-in-turbotax-online

https://ttlc.intuit.com/community/income/help/what-if-it-s-february-but-i-still-don-t-have-my-w-2/00...

https://www.irs.gov/taxtopics/tc154

And….SAVE YOUR OWN W-2!  TURBOTAX DOES NOT SAVE IT FOR YOU.  TurboTax will not have a copy of it in your account and will not have an image even if you snapped a photo.  It is up to you to save it for your own records as stated on the back of the W-2.

[GeorgeM777]

If your employer has partnered with TurboTax, then after entering your employer's EIN and other information into TurboTax, TurboTax will be able to import your W-2 information into the application.  If you already have your employer's EIN number, and the other information you need to begin the importing process, and you still cannot import your W-2, then you may have to wait until you receive your paper copy of your W-2, and thereafter manually enter the relevant information.  

Employers are required to file W-2s and other wage statements with the IRS by January 31, 2022, which is also the date that employees should also have their copy.