A new option was added in the workshop application: Fill in missing mileage at task start. You can find this option by clicking on the 3 dots in the top right corner of the workshop application. Here you can go to Options. This setting is only available in the latest update of the workshop application. If you do not see this setting, this means you will have to update the application first. When this option is checked, a task can only be started when a mileage has been entered.