Hello @YamidBarbosa
Thanks for posting this in the Global Canvas Community!
I am very sorry that you are having trouble syncing grades to Powerschool from Canvas. It sounds like there might be a grade sync error occurring.
Are you able to do a Remaster Sync in the course? This is usually a great place to start troubleshooting Grade Passback issues. This can be done by going to the Grade Sync area of the course in the Navigation. If you don't see Grade Sync, you can try to enable it in the course navigation(Settings >Navigation) Under the Utilities tab, you should see an option for 'Remaster Grade Passback.' Once you remaster the grade passback, if there are any issues occuring during the sync, an error should be listed and a log that can be downloaded. Canvas support can usually take a look at the error and try to pinpoint what might be causing it, if you are unable to figure it out on your own.
Hopefully this helps! Let us know what you find out on this!
-Colton