It sounds like your parents bought their insurance from the Healthcare Marketplace, and you had a 1095-A. (If your mom's insurance was provided by her employer, then you can ignore the rest of this answer. All you need to do is report that you were covered by insurance.)
When you share a Marketplace plan with someone else, you need to agree on your percentage of the plan. The percentage can be anything from 0-100%. Everyone on the policy needs to report the 1095-A on their tax return.
You need to enter
the 1095-A exactly as printed.
To enter all this in
TurboTax:
1. Type
"form 1095-A" in the Search box, then select Jump to form 1095-A.
2. When
you get to Was anyone enrolled in any of these less common plans in 2016, click
Yes.
3. Under
What type of plan were you enrolled in, select Obamacare plan.
4. Enter
the information on your 1095-A, then click Continue.
5. Under
Do any of these situations apply, check Shared this policy with
another taxpayer who is not on my taxes.
6. Under
Since this is a shared policy, we need to know how to allocate the policy
amounts.
Enter your percentage
amount in each of the three boxes for Premium, SLCSP and PTC. (Click on the
screenshot below for an image.)
