
Quoting
flyingron
Actually, Rhode Island is one of the places it's good to be a minor. They have no statutory right to that demand on (non-emancipated minors). If you were an adult, they could hit you up for 3 times the value of the item plus somewhere between $100 and $500 (plus court costs if they have to take you to court to collect it).
You probably dodged a bullet there. If you get a letter from Kohls's lawyers you can respond that you are under 18 and cite that RI Code 11-41-28 does not apply to minors.
The fact that you opened the box makes the eyeliner unsalable. They can't (or at least shouldn't) put potentially tainted cosmetics back on the shelf as new.
They still could report you to the police, but that's probably not likely. You need to tell your parents anyhow before they see the letter from the "lawyers" and find out that in addition to being a thieving little girl, you're deceitful and disrespectful to them as well.