yes you need to file. unless this is a hobby you would need to file Form 1040, schedule C to report your income and expenses and form 1040-SE because you would owe self-employment taxes of a little over 14% (effective rate) on your net profit if it exceeds $400. also, you would owe income taxes if the net income exceeds your standard deduction of $12,550 (for 2021. I'm assuming you can't itemize). other forms could be needed. Turbotax would guide you through the process.
see this link for the guidance provided by the IRS on hobby vs business. no one criteria is determinative except having losses year after year and not being able to show you've taken steps to either terminate the activity or turn it profitable.
https://www.irs.gov/newsroom/earning-side-income-is-it-a-hobby-or-a-business
for a hobby
For 2018 and later years, hobby income is reported on Schedule 1 (Form 1040) Other income. Hobby income is taxed at the taxpayer’s regular rate. income is reported gross. The 2017 Tax Cuts and Jobs Act suspends miscellaneous itemized deductions including hobby expense deductions for tax years 2018 through 2025.
