We recommend closing your survey (archiving it for later,) rather than deleting your project. This way, you can still access your data.
If you still find that your project isn't quite hitting the mark, or you've made a test project, you may decide to delete it. Unlike the archive option, you will not be able to retrieve or revisit a deleted survey, nor make it live again without restoring it from the organization's archives.
To completely delete a survey (delete the project and its responses), go to the Settings tab and click the Delete Project button.
And... BYE! 👋 It's gone.
Related articles:
How to archive a project
How to un-archive a survey
How to schedule a close date for your project
How to change your survey to draft mode