There is one place to go to make and edit forms, checklists, and calculators. To get here, you choose "Create" at the Main Menus at the top of any page on the site. Just like with almost any other page at the site, you can toggle between the functional Form and the Markup by clicking on “View” up and to the right of this page.
When you’re logged in, you can save the stuff you make and edit at this page. You can just start typing or you can paste some text into the “Form Content” box. You can use the buttons at the right side to insert form elements quickly. Or you can load up other text with the “Open” menu (up and to the left on this page).