Do I need a permit or anything for a small business?

I just cracked my iPhone screen and was looking for ways to make money to fix it. Rather than just baby sitting or watching dogs, a few of my friends and I thought that a small lawn care "business" would be fun. We're just looking to mow some lawns and possibly do some weeding, but are we going to need a license for that if we aren't just mowing our neighbors lawns?

You can't get a license because of your age
and that is not a biz yet

go cut lawns
earn $

fix the phone

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