To remove the incomplete check mark from grades after they have been review follow these steps 
  1. Navigate to Academics > Grades > Grades Management > Review Grades
  2. Select the Grade Plan* and click view
  3. Select the Course Section
  4. Uncheck the Review boxes for the class
  5. Click 'Save'
  6. Navigate to Academics > Grades > Grades Management > Enter Grades by Class
  7. Select the Grade Plan and click view
  8. Select the Course Section
  9. This will allow you to uncheck the review boxes which will in turn now allow you to uncheck Incomplete and recalculate the grades for the student
  10. Click 'Save'
* If a Grade Plan does not appear in the list, you will need to edit the review period under Academics > Grades > Grading Setup > School Year Setup. You can either remove or extend the 'Review End Date'.