How to calculate my SLCSP percentage since I was covered under my parents with my 8 siblings B it I am filing my own taxes not as their dependent

To calculate your Second Lowest Cost Silver Plan (SLCSP) percentage when filing your own taxes independently, follow these steps:

1. Use the information from Form 1095-A, which details your health insurance coverage.
2. You should see amounts on your parents’ 1095-A, columns A, B, and C. You and your parents should agree on what percentage of those amounts you’ll claim on your return, and what percentage they’ll claim on theirs. You can use anything from 0% to 100%, as long it all adds up to 100%.

For more details, you can refer to TurboTax guidelines and HealthCare.gov.