The IRS must incorrectly have you on file as having marketplace health insurance. A 1095-B or C does count for coverage but you are not required to enter the details, as the IRS does require with a 1095-A. If you have received a letter from the IRS asking for a form 8962, your 1095-A and possibly even a recomputed page 2 of your 1040 or 1040A, but you did not have health insurance through the marketplace, then it is best to respond. You may call the phone number in the letter, or reply to the letter and explain you did not have marketplace health insurance. Please reply to the address noted on the letter and include a copy of the IRS letter.
Click below for more information about this letter, including “What you need to do”.
https://www.irs.gov/individuals/understanding-your-letter-0012c