Throughout the form, you have an option to save your work and return to it at a later date. You do not need to press save on every page unless you want to exit the application on that page. You will receive a link to use to get back into your form.
You can print the form at any point by clicking the Print form.
When you are satisfied with your responses, click "Submit".
Once you submit the form, you will see a screen that indicates that your form has been submitted and you will receive an email. They will include two links: one is to edit your form, and one is to get a PDF of your form. The edit button lets you edit the form as many times as you need to prior to April 1. All your previously entered information will be there, as long as you use the edit link provided on the acknowledgemet screen.