Deleting the business or the account
A deleted business can come back for 90 days. Your account cannot.
Deleting a business
Under Settings → Danger zone. Whoever opens the address reads that the business is no longer available. For 90 days you can bring it back under Your account; after that, your customers’ data is deleted for good, and only what the law requires to be kept remains.
Deleting your account
Under Your account → Delete my account. It deletes your name, your email and your sessions; the businesses carry on with whoever stays.