Did your mother drop you on your head?
If you do this as a part time endeavor to make extra money, it is not considered a business. (Like babysitting) Do not repair any Computers at your house/home. Do not charge a fee but explain that you would appreciate donations. Most professionals are earning 25/75 hour in the Big City, but you can afford to help your clients for your states average hourly wage. (7-10 an hour) Start w/tutor help and web design if that s what you can do and or upgrades to computers.
Seeing as it isn t an actual business I don t believe you need one.*****, anyway