I can't view completed tasks as indicated on the help page. I also do not seem to find an option for recurring tasks etc...
According to our database, your account is Premium. Please log out and back into your account and if this won't help - log out, clear your browser's cache , reload the browser and then log back in.
The free option of viewing completed tasks can be accessed after entering a project and clicking on the icon in the bottom-right corner below your task list.
The Premium option to view all completed tasks across project is available by clicking on the Karma score in the top-right corner and going to "View completed".
Recurring tasks are a free feature and you can set a recurring task simply by typing "every day" or "every Fri at 2pm" within the due date field. For a full list of supported due dates, please refer to this page: https://todoist.com/Help/timeInsert