The 1040 is the tax return you filled out by entering your W2s. You efile or mail the 1040 to the IRS. You can and should preview the 1040 before you file.
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...
