This is a useful tool that the IRS provides to see if you need to file a tax return: https://www.irs.gov/help/ita/do-i-need-to-file-a-tax-return
Also, these are the general guidelines concerning when you do and do not need to file a return: https://turbotax.intuit.com/tax-tips/irs-tax-return/does-everyone-need-to-file-an-income-tax-return/...
Moreover, if you've had taxes withheld, even if you don't need to file a return, you should file in order to get the refund.
Filing for refunds
Even if you aren’t required to file a return, you still may want to. If you don’t owe tax at the end of the year, but had taxes withheld from paychecks or other payments—filing a return may allow you to obtain a tax refund. You may also be eligible for certain refundable tax credits, like the Earned Income Tax Credit (EITC), which could generate a refund for you. The only way to get your tax refund is to file a tax return.
You may also qualify for the child tax credit if you have $2500 or more of earned income. https://ttlc.intuit.com/community/credits-and-deductions/help/what-is-the-child-tax-credit/00/25961
Answers are correct to the best of my ability but do not constitute legal or tax advice.
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