No APTC (Advanced Premium Tax Credit) will be paid for this policy.
When you go through a questionnaire at
www.healthcare.gov/under-30/#/, the answer clearly seems to be "no". It says:
You can be added to your parent’s Marketplace health
plan, but they won’t be eligible for a premium tax credit or other
savings, regardless of their income.
However, within the IRS instructions for Form 8962 the answer clearly seems to be "yes", because there is an example at page 16 which outlines a shared policy allocation and says:
Gary and his 25-year-old non-dependent son, Jim, enroll in a qualified health plan. Jim has no dependents. The policy covers Gary, Jim, and Gary’s two young daughters who are Gary’s dependents. No APTC is paid for this policy ... Gary and Jim are applicable taxpayers and each can
take the PTC.
