Can I preview or see my actual tax forms before filing?

You have to pay your fees before you can print.

https://ttlc.intuit.com/community/printing/help/can-i-print-a-copy-of-my-turbotax-online-return-before-i-file-it/00/26244

If you have paid the TurboTax account fees you can view or print your complete tax return.

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