How do I save what I've entered and quit the session until I get more info?

Click My Account in the top right, then click Save & Sign out. When you are ready to return just log in with the user ID and password you created and you will be prompted to continue where you left off. 

Hope this helps.

The Online program automatically saves your information as you enter it.  You will also be prompted to save before your sign out.

Click on Sign Out (bottom left corner; if you don’t see it, Click on Tax Home first).  Remember user ID & PW in order to log back on later.