Do they file a US tax return? Do you qualify as their dependent if they do? If the answer to either of these questions is no, then you are independent.
Qualifying Child
Relationship — the taxpayer’s child or stepchild (whether by blood or adoption), foster child, sibling or step-sibling, or a descendant of one of these.
Residence — has the same principal residence as the taxpayer for more than half the tax year. Exceptions apply, in certain cases, for children of divorced or separated parents, kidnapped children, temporary absences, and for children who were born or died during the year.
Age — must be under the age of 19 at the end of the tax year, or under the age of 24 if a full-time student for at least five months of the year, or be permanently and totally disabled at any time during the year.
Support — did not provide more than one-half of his/her own support for the year.
You can claim a child, relative, friend, fiancé (etc.) as a dependent on your 2019 taxes as long as they meet all of the following requirements :
Actually, the first question that needs to be asked/answered is, are "you" a U.S. citizen or resident alien with a social security number? If not, then you can't use any version of TurboTax to file your U.S. tax return, and a completely different set of rules applies to you. You have to file a 1040-NR which TurboTax does not support. But see https://www.sprintax.com/ for completing the 1040-NR online.