Realize there are two determinations to be made here, and they have no relationship to each other.
The first determination is to determine if anyone else (namely your parents) qualify to claim you as a dependent. If you provided more than 50% of your own support, then you parents do not qualify.
Now for determining if you meet the 50% support requirement (and only for this requirement) what counts here is:
-Scholarships/grants received in the tax year, regardless of what tax year it was received *for*. This money is not "YOUR" money, so it does not count for you providing your own support.
- 529/1099-Q funds received in the tax year, regardless of what tax year it was received *for*. This money is not *YOUR* money, so it does not count for your providing your own support.
- Gifts received from Aunt Mary (or the 350 a month from your parents in this case.) This money is not "your" money (because you didn't physically earn it) so it does not count for you providing your own support.
Money you borrowed from an accredited lender, in which you are the primary borrower and you are the primary person responsible for paying it back. (This money DOES count for you providing your own support.)
Money you earned through a W-2 job or self-employment during the tax year. (this money DOES count for you providing your own support.)
Money in a bank account where you are the primary account holder on that account, and the money in that account was earned by you, regardless of when you earned it, even if you earned it years ago. (this money DOES count for you providing your own support.)
Inheritied money from a Last Will & Testament or a Life Insurance payout where you are the named beneficiary. (this money DOES count for you providing your own support, even though it's not reportable on a tax return, ever.)
THe above is used to determine if someone else can claim you as a dependent on their tax return, and that's the only thing it's used for. So do your parents qualify to claim you on their tax return? Understand I'm not asking you if they will or will not claim you. I'm asking you if they *QUALIFY* to claim you. Depending on the amount of scholarships, grants, 529 funds and gifts received, the amount of borrowed money disbursed to you by the lender in 2017, and the tuition and other support expenses paid (rent, food, transportation, utiites, etc.) it could go either way.