Being able to claim someone as a medical dependent is different from claiming someone as a tax dependent. Important for same-sex married couples.
People in same-sex relationships know that if a same-sex partner is not a dependent, then the value of health benefits provided to that partner are taxable income. Some of my clients in same-sex relationships have upwards of $10,000 of "income" added to their W-2s because they have a partner on their health insurance. But most people, [...]