Can I get to the step to print the forms (so I can see estimated AGI and #s needed for a school app) and still revise my numbers later once I get W2 before I submit?

I understand not to submit without actual numbers/W2 but I need line by line numbers for an application due soon (they are fine with my estimates). Is this possible (to then go back in) without it being an amendment since I haven't actually filed?