Solved
I've mistakenly used goods and services when receiving money from PayPal multiple times from the same person, even though I did not sell anything, now I got 1099-k.what should I do? I have $21000 total gross,
You can adjust the taxable amount of income on Form 1099-K but you also need to keep documentation of what the transactions were if not income.
If the 21,000 represents gifts from one person, that person should also file a "Gift Tax Return" although that would not be your responsibility.

Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.