Ok, so me and another person A LOT older then me. I'm 18 next month and the other person is about, well over the hill, probly 53. Anyway. We are going to go in business together this upcoming summer, and if we got our business licence to write off things and crap like that. When customers gives us checks. Do we need to pay income on that if we took it to the bank and just cashed it and not deposited it. Or would the government find out about it. Because my neighbor has his own business and when his customers gives him checks that don't have the taxes taken out. He takes them to the bank and puts it in the "sock drawer". Would you need to pay taxes on things like that? I hope you guys know what I'm getting at?