Hello Amjad,
The process is slightly different depending on whether your school is using the "new" grade book in Canvas or not, but in both cases you'll need to have the grades in a CSV (comma-separated value) spreadsheet file.
There are instructions for the old grade book atHow do I upload changes to the Gradebook?
and for the New Gradebook athttps://community.canvaslms.com/docs/DOC-16546-4152813649
Mike
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