Why am not seeing my whole 2018 tax file, only a portion of it when I download it? and I need all 150 pages or how ever many it was last year.

The new "simplified" 1040 form for 2018 is now the only 1040 form. The old 1040, 1040A and 1040EZ have all been replaced with the new 1040 and 6 new schedules for additional items that are transfer to the new 1040.

2018 will be fewer pages than 2017.

https://ttlc.intuit.com/questions/4511015-what-are-the-new-schedules

Try printing from the Print Center

Log back in your TurboTax account and "add a state" to open the return back up (you are not really adding a state, just to open it back up), then

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