You can review your Form 1040 and Schedules 1, 2 and 3 at any time when using the online editions
Click on Tax Tools on the left side of the online program screen. Click on Tools. Click on View Tax Summary. Click on Preview my 1040 on the left side of the screen.
If you have paid for the TurboTax online account with a credit or debit card, you can review all of your federal and state tax forms, schedules and worksheets.
Click on Tax Tools on the left side of the online program screen. Then click on Print Center. Then click on Print, save or preview this year's return. Choose the option Include government and TurboTax worksheets
You can preview Form 1040 and the Schedules 1-3. You do not have direct access to any of the other forms or schedules until you pay your fees.
PREVIEW 1040
https://ttlc.intuit.com/questions/1901539-how-do-i-preview-my-turbotax-online-return-before-filing
Click on Tax Tools on the left side of the screen. Click on Tools. Click on View Tax Summary. Click on Preview my 1040 on the left side of the screen.