Dear respected Noah Pinchers,
Good day! Thank you for posting to Microsoft Community. We are happy to help you.
As per your description, it seems that you want to remove the submitted response from Microsoft Form.
You may follow my steps below:
1.Go to your Microsoft Form
2. Click "Responses" tab
3. Click on View Results
- Choose the response you submitted from the drop-down
- Click the 3 dots (. . .) on the bottom right of the greyed response area.
4. Click on "Delete Response"


If there is many submitted response, you may click on "Delete all response button".

If there is any misunderstanding, I apologize and please feel free to post back to us with more detailed information for better understanding and guiding you further.
Appreciate your patience and understanding and thank you for your time and cooperation.
Sincerely,
Waqas Muhammad