holy crap, OP is a retard
OP, here's a hypothetical situation for you, and hopefully all the answers you need, but you seem pretty dumb so i might just be wasting precious bits on the internet here
1) let's say you made 15k selling dildos from your storefront this year, cash transactions
2) let's say you also provided male prostitution services for 12k, all on paypal [but hey, what you do is none of my business, retard]
3) let's say that the asshole reconstruction surgery cost you 8k, which you're going to write off as an expense (BAD IDEA RETARD, GET AN ACCOUNTANT)
when you report your taxes, you must report them like this (assuming sole-prop, or any business taxed as passthru):
REVENUE: 27k
EXPENSES: 8k
[insert receipts for 18k here]
you'll notice a few things here -- like, for example, we didn't leave out the paypal monies just because they didn't W9 us, and we didn't qualify ourselves as mentally inept by only reporting 19k (27k income - 8k expenses) as our income. shit doesn't work like that, and if you're doubting that the tax man will-soon-be-or-already-is watching the everyday bankaccounts of every US citizen, you might want to reconsider.
they *KNOW* you made 27k this year, and your job in filing taxes is to 1) Not lie about that shit, and 2) tell them how much you spent on justifiable business expenses, along with receipts for proof. if you fuck up on either of these two little things, you're gonna get fucked in the ass, yet again and this time it's by a big fat government dick. they won't pay you for the sex, and you can't even write off the cost of the next asshole surgery you now need because they ripped you like used kleenex.
so, to answer your question retard OP, stock up on astrolube and profit all you can this year; and don't forget to stock away your pimp uncle sam's cut. there is no "magic threshold" after which you owe taxes, you already owe taxes.