If Part I of Form 8965 is not filled in, you do not need an Exemption Certificate Number.
Exemption code A does not require an Exemption Certificate Number.
Did you get a notice from the IRS about your coverage exemption? What exactly does the IRS notice say about an Exemption Certificate Number? They would not be asking for an Exemption Certificate Number for exemption code A.
Exemption code A means that coverage is considered unaffordable because the amount you would have to pay for insurance is more than 8.16% of your household income. Is the notice saying that they disagree that coverage is unaffordable? Did the IRS make any other changes to your tax return that change your income, and therefore change the affordability calculation? Are they saying that you would need an Exemption Certificate Number if you want to claim a different exemption?
I suggest that you call TurboTax support to get help with your IRS notice. Go to the link below, and then click on "Get help from TurboTax support" and follow the prompts. The current support hours are Monday - Friday, 5:00 a.m. - 5:00 p.m. Pacific time.
TurboTax Audit Support Center
