If you are not a full time student, and age 19 or older, and earn more than $4050 of taxable income, then no one can claim you as a dependent due to your age and income, no matter who you live with. You can file amended returns for each past year where those statements are true, un-check the box that says "I can be claimed as a dependent" and claim your own personal exemption. At this point, you can amend your 2014, 2015 and 2016 returns. The deadline has passed for 2013 and earlier returns.
If you are a full time student, then you may be a dependent of the relatives you live with. You can be a dependent of another relative besides a parent -- the types of relatives who could claim you as a dependent are an older sibling, a grandparent, or an aunt or uncle. If you are living with one of these types of relatives while being a full time student, they can claim you unless you provide more than half your own support.
Support you pay for yourself includes tuition you pay (whether from earnings or from loans in your name), travel, entertainment, clothes, and so on. Support that your relatives provide you includes a share of the home's rental value, utilities, and food, among other things. (In other words, if the home would rent for $2000 per month, and there are 5 people living there, your relatives get credit for providing you with $400 per month of rent.) There is a worksheet for the support test here <a rel="nofollow" target="_blank" href="
https://www.irs.gov/pub/irs-pdf/p501.pdf">https://www.irs.gov/pub/irs-pdf/p501.pdf</a>
If your relatives provide more of your support than you do, and if you are a full time student, and they are the right kind of relative, then they can claim you instead of your parents.
If none of those things are true then no one can claim you and you can amend.
Here are the amending instructions. You need a separate amended return for each year, and mail them in separate envelopes.
Amend <a rel="nofollow" target="_blank" href="
https://ttlc.intuit.com/replies/3288565">https://ttlc.intuit.com/replies/3288565</a>
