If your organization still uses the classic timecardA mechanism for logging time against a project or an assignment. user interface users can log a new timecard from the projectA collection of activities and related items to be managed over a defined time range, such as timecards, expenses, milestones and budgets. or assignmentConnection between a resource and a project. related lists for timecards using the Log a Timecard – Classic button. If you want users to use the enhanced timecard user interface they can do so using the Log a Timecard – New UI button on the related list.