Yes, you can file taxes making only $5,000 and should file due to having taxes withheld and possibly getting Earned Income tax credit.
If you have no children and have income less than $15,010 in 2017 you can qualify for Earned Income Credit.
This will go up if you have children you are claiming.
Click on link for more details:
https://www.irs.gov/credits-deductions/individuals/earned-income-tax-credit/do-i-qualify-for-earned-...
