Your referred to your son as a "partner", partners are responsible for all debts of the partnership, even a partner with a tiny percentage of the ownership. If your son was not actually a partner but a member of a limited liability company or a shareholder of a corporation, he would only be liable for taxes if was responsible for collecting, accounting for and/or paying the withholding taxes. The IRS views these activities broadly. For example, if your son either had the responsibility to decide which bills to pay or actually signed the checks/authorized the transfers, he's liable if he paid any other bills when the taxes where due.
Answered on Jun 22nd, 2015 at 3:30 PM