I accidentally deleted a form. How can I get it back?

It is possible that the deleted form is still in the Trash folder. Please check this guide: How-to-Restore-Deleted-Forms.

I found out that your account is in overlimit status. Under the Free plan, you have 100MB storage space. You currently have 100.38MB. Please delete the submissions with uploaded files to clear your storage space. Here's a guide: How-to-Delete-Form-Submission-Data.

Hope that helps. Thank you.