Start with your city's finance office, which you can probably find online. You're likely to need a business license, and to pay business tax for this business.
And that's the city requirements. You're also going to be responsible for state and federal income taxes.
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Call the city clerk and she (or he) will let you know what licenses you need.
See a business attorney for establishment of a business so you minimize personal liability and to clear and protect your business name.
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