If you file a tax return for any reason, you are required to report ALL your taxable income and to pay taxes on it. If you are in business, you are required to keep accurate business records of your income and expenses, even if you don't get tax paperwork from your vendors or clients.
The rules on who must issue a 1099-K only apply to the payment processors. It has nothing to do with you as the receiver of the funds. You must report all your taxable income on both your federal and state tax returns, regardless of whether you get any paperwork from the payment processor.
Now, sometimes you might get a 1099-K for money that is not taxable income (such as gifts received from GoFundMe or similar platforms). And sometimes the money might be "other income" and sometimes it is self-employment income. And the entire amount is not always taxable, especially in the case of self-employment, because you can deduct your ordinary and necessary business expenses and only pay tax on the net profit.
So the real question is, what did you do to get the money that will be reported on a 1099-K?
