Itu2019s really going to matter on where you live. Generally in the US, if you are going to run a small business as a sole proprietor with no employees, youu2019ll register a u201cdbau201d or u201cdoing business asu201d form with your local county, register for sales tax with the state, and itu2019s a good idea to get an EIN from the federal government too. Go slow, ask questions, and thereu2019s lots of help to get through the simple forms. Usually costs about $50ish bucks for the dba, and the other two are free. You DONu2019T need a lawyer for that. But itu2019s never a bad idea to have a business lawyer, even if you donu2019t use them right away. Business insurance is more important. Good luck!