How can a view my 1040 page 1 while I am still working on completing my taxes

Yes, you can preview your Form 1040 while working on your tax return:

1. Click on "Tax Tools" in the left menu
2. Click "Tools"
3. Click "View Tax Summary" in the Tool Center window
4. Click on "Preview my 1040" on the left

I agree with DanaB27.  You can view your 1040 or any form as you are completing your step by step.