I have created a Marketo Form which is embedded into one of our websites. The form has a Submit button for those who have completed it but how do I view and edit the email address that the form is submitted to?
Marketo forms don't inherently submit the data to an email address - instead, data is submitted into Marketo, and can then be populated into an email alert which can be sent to your team (a "sales alert", which is most likely what you've got happening here).
To find out whether this is the case (and update it), you'll want to look up the program managing this form in Marketo, and edit the smart campaign that's triggering the sales alert out.
If you don't know where this smart campaign might be, you can find out by navigating to the forms section in design studio...
Selecting the form you're looking for from the list...
And looking at what smart campaigns reference that form.
Then look for a "send sales alert" flow step and update accordingly.