How do I get a copy of my entire tax return to print out? I can only get the one page.(1040 I think)

Use Print Center if you want all the worksheets and informational pages.

For tax year 2018 the IRS Form 1040 is two half pages.  For printing the the half pages are combined to one page.  There are 6 Form 1040 supporting schedules, Schedule 1 thru Schedule 6.

IRS Form 1040 (2018) - https://www.irs.gov/pub/irs-pdf/f1040.pdf

When you sign onto your online account and land on the Tax Home web page, scroll down and click on Add a state.  

This will take you back to the 2018 online 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