It depends upon the type of income you earned.
Self-employment income/profit of $400 or over is required to filed a tax return.
But, if your $4,940 was reported to you on a W-2, then you are not required to file. (If any federal or state income taxes were withheld, then you would want to file to get those refunded.)
See more information below:
https://ttlc.intuit.com/replies/3302274