Can I use freeze away for skin tag on eyelid?

Skin tag. Don't do it at home. Your best bet would be to have your eyes evaluated by a board certified facial plastic surgeon.
Bad idea. easy to damage eye or eyelid. See a plastic surgeon.
No. You will be sorry. These are very easy to remove. Done by dermatologist, eye surgeon, cosmetic surgeon.
No. The skin of the eyelid is very thin and delicate, you may hurt yourself irreparably. See an opthomologist or a dermatologist.
No. I don't advise this. If you accidentally get the chemical in your eye, you can end up with another problem. Skin tags are benign and if bothersome, may simply be clipped off by an eye md.
Do not self treat. on the eyelid. It is better to have it treated by a doctor.