I have W-2s from 2017/2018 in 2019 and I want to file them all together how do I do so

[Critter]

You CANNOT mix income from different tax years onto the same tax return ... each year MUST be filed separately.  Only the 2019 return can be completed with the current online program. 

How do I prepare a prior-year tax return?

If you need access a TurboTax Online return that you already filed, we've got instructions for that.

If you started an online return but didn't complete it before the mid-October shutdown, we can help you finish it.

Tax years 2016, 2017, and 2018

1. Select your TurboTax product for the year you'd like to file. (Unfortunately, TurboTax Online is only available for the current tax year.)
2. Select your operating system.
3. Purchase your TurboTax product.
4. Download and install your TurboTax product.
5. Complete your return in TurboTax. We'll guide you through the process.
6. When finished, print and file a paper return through the mail. (Prior-year returns cannot be e-filed.)