Yes, you need to fill out the ECN on Form 3853 if you have been granted an exemption from the health coverage requirement. This number is provided by Covered California in your exemption approval notice
In TurboTax:
- When you get to the California state return, TurboTax will ask about your health coverage for the year. If you had coverage all year, simply confirm that. Next:
- TurboTax will prompt you to enter any exemptions. If you have an ECN, enter it when asked.
If you had health coverage all year, just confirm that in the health insurance section of TurboTax, and you won't need to fill out the ECN.