I was taking 20mg of accutane for three weeks and didn't finish the course. Would it be safe to get semi permanent make up done?

It would be fine as long as your treating permanent cosmetic artist is aware and consents. I would be fine to have you do it, but it's up to that person as their license is involved. "This answer has been solicited without seeing this patient and
cannot be held as true medical advice, but only opinion. Seek in-person
treatment with a trained medical professional for appropriate care."