The 1040 is the form you are filling out by entering your W2 and any 1099 form you receive. When you are done entering your income and info you either efile or print the 1040 to mailed in.
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...
