When you complete a To-Do, you have the option to create a follow-up To-Do:
After you enter the Activity Code, Hours, Complete Date, etc., on the original To-Do, you can click on the radio button for the Follow-up To-Do in order to open the additional fields where you can enter information for the follow-up To-Do and assign it to yourself or somebody else:
Note: The option for a follow-up To-Do is not available when you Quick-Complete a To-Do.
Once you choose to Save, Save and Close, or Save & Submit, the original To-Do gets completed and the follow-up To-Do is the one that is pending.