Yes...you support yourself.
The question is the more for people (usually unemployed) whose parents, or other family may be providing their support, housing, food, healthcare.
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It "might" be possible that you should say that you did not provide 1/2 your support ...IF...IF you joined the service late in 2016 and your parents provided your support up until then......but that's a stretch. IF you might be in such a situation, you may need to talk to your parents to see how to handle that question for 2016....otherwise, you are now on your own......and working for the USA.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
