You can use the Gradebook to pass final grades back to Skyward. Grades are passed back if an assignment is specifically included as part of the grades transfer. You can include grades for assignments, graded discussions, and quizzes on a per-assignment basis.
To pass back assignments, an assignment group must match a grading category in Skyward. You can also pass back individual sections instead of the entire course.
When grades are sent, Canvas will immediately initiate the grades transfer, but you may need to wait a few minutes before data appears in Skyward.
Here is a video on how to set up grade pass back:
The Canvas step-by-step guides: