How can I turn off the email that will send to respondent of my form?

How can I turn off the email that will send to people when they fill out my form?

Are you referring to the autoresponder of your form? If yes, just delete the autoresponder and no email will be sent to the respondent of your form.

Guide:
1.) Go to your FORM SETTINGS.
2.) Select EMAILS.
3.) Hover your mouse to the autoresponder and then delete it.