How do you erase the old information on the form?

Greetings,

Thank you for reaching Support.

Are you referring to the submission entries? If that's the case, then this guide on How to Delete Form Submission Data will show you how to do just that.

If you want to edit an entry, you can follow this guide on How to Edit Submissions Made on Your Forms.

Please give it a spin and if you have further questions, let us know.