Ole cancel my Account and all data
To cancel a Todoist account, please log in at https://todoist.com click on the gear icon in the top-right corner and go to Settings -> Account. You will find a "delete my account" link at the bottom of this window.
No sign in the upper right corner
Please make sure you're using a desktop computer otherwise it will redirect you to a mobile version of Todoist.
If you currently don't have access to a desktop, please use this URL: http://todoist.com/m/forceRegular which will force your mobile browser to use the full version and there you will find the gear icon in the top-right corner (once signed into your account).