There are many you tube videos from physical therapists etc. that show how to apply.

If you're getting PT, your PT therapist can probably show you.

Otherwise, here's a good list of all the parts of your body you can tape, and when you click the part you're interested in taping, there's a page with a video showing you how to tape.
https://www.kttape.com/pages/how-to-apply-kt-tape

It's easy to learn, and such a help for some extra support.

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You tube!