Banks and credit unions are generally the best places to exchange. You will get the most reasonable exchange rates. Airports have a higher exchange rate because you are basically paying extra for the convenience factor. You should be about to research what bank/credit union exchange rates are to pick the best one.
How to Report Foreign Income. If you are a U.S. citizen or U.S. resident alien, you report your foreign income on your tax return where you report your U.S. income. That is, on line 1 of IRS Form 1040.