Can I delete old JotForms I don't need anymore? and if so, How?

You may delete the forms in your account by selecting the form and then click on Delete button from the menu. The deleted form will be moved to the Trash folder and you may restore them later. If you want to remove the forms permanently, you may select the deleted form in the Trash folder and click on Purge button. Please be noted that the purged forms cannot be restored in any way.