How to delete submission data received between a date range?

Hello BLADEOFGRASS,

If I understand your question correctly, you want to delete previous month's submission data from your form. Is that correct?

You may like to take a look at the following guide which should explain you all the options available to delete submissions:  https://www.jotform.com/help/377-How-to-Delete-Form-Submission-Data 

Please check point #6, 7 & 8 on how to delete submission based on a date range.

Hope this helps.

Do get back to us if you have any questions.

Thank you!