Only Project Managers and Organisation Admins are allowed to set targets.
Steps
You need to add goals to your project before you can add targets. Targets are attached to goals and sub goals.
Launch the My Apps ribbon
Select Projects
You arrive on the My Projects page
Find the project that you want to set targets for
Select the More Options button for that project
Select Targets
You arrive on the project’s Targets page
Set targets for each goal and sub goal
It is fine to set targets for some goals and not others
Choose Add deadlines if you want to set Monthly or Quarterly targets.
You can choose the date of each Deadline and can therefore set custom deadlines for your targets
If for progress tracking purposes your year starts on a date other than 1st January, use the Year Start Date to pick an alternative date to base your year from