If you are using the Online version you can't open the forms. You can see them by downloading the pdf file to your computer. Before filing you can preview the 1040 or print the whole return
https://ttlc.intuit.com/community/accessing/help/how-do-i-preview-my-turbotax-online-return-before-f...
If you are using the Desktop program you can see and enter in to the actual forms by clicking on Forms in the upper right (or left for Mac).
