If you are using the TurboTax Online version of the software, you are not able to view forms mode to view each form in your return to make edits. The only form you can view in the online version is your 1040. See below for how to view forms in your return using desktop version.
If there is a specific section you need to edit in online version, you can input that form name in Search box in top right, and jump to that section from there.
NOTE: If you only need to view your 1040, you can do that by clicking My Account in top right, choose Tools and then View Tax Summary. Once there, click Preview my 1040 near top.
https://ttlc.intuit.com/replies/4225672
