If you have not filed your tax return yet, you can look at your 1040:

Select My Account at top of screen
Select Tools
Select View my Tax Summary
Select Preview my 1040.

If you have already filed your tax return, you can view it by:

Sign back into your Turbo Tax online account.
From the Welcome Back screen, select Visit My Tax Timeline
From the list of Some Things You Can Do on your Tax Timeline, select Download /Print My Return (PDF)

Create the PDF of your tax return. Then open the PDF and scroll to your Form 1040.