Beginning this month, you can sign up for a new 2017 health insurance policy on the health insurance Marketplace. You can also change or renew the policy you purchased during the last enrollment period. Even if your current policy has an automatic renewal feature, you’ll want to verify that you’re getting the best deal, and that you are still eligible for the federal premium tax credit.

What if you didn’t sign up last winter and didn’t have health insurance coverage in 2016? You may owe a penalty on your 2016 federal income tax return. The penalty is calculated in one of two ways: as a percentage of your income, or on a per-person basis. You pay whichever is higher.

For 2016, the penalty is 2.5% of your annual household income, up to a maximum of the national average premium for a Bronze plan. The per-person penalty is $695 per adult and $347.50 per child under 18 (up to a maximum per-family penalty of $2,085).