How to delete an old form?

How to delete an old form?

I'm sorry, but I need to clarify if you are asking how to delete a form or a submission. Anyways, to delete a form, you need to go to My forms page (https://www.jotform.com/myforms), select the form you want to delete and click Delete option:

If you mean to delete a submission, please follow the steps in the guide below:

https://www.jotform.com/help/377-How-to-Delete-Form-Submission-Data

In the guide, there is a step where you can filter submissions to delete.

Note that deleted data cannot be recovered, so make sure to have a backup first before deleting. 

For your second question, I will provide you the answer in the next thread here https://www.jotform.com/answers/1796488.