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Does renting a room on AirBnB make all interest taxable?
It says that you are exempt "as long as such interest income is not effectively connected with a United States trade or business". So the interest is from money earned from doing business with/through AirBnb, a US company. So you will have to report it. Even if your bank doesn't send you a 1099-INT, you have to report it, unless it is under $0.49 because the IRS allows rounding.