No, you do not need to file taxes. ItWorks income would be reported on 1099, not W-2.
However, you do not get one if you do not make over $600 for the tax year.
You do not have to file a tax return if you do not have over $400 in self-employment income (ItWorks is self-employment).
Since it does not sound like you made $400 in 2018, no return is necessary.
