Originally Posted by
slawecki
call in advancd(i don't know where) to find out where to deposit the form, and get a receipt. i always had difficulty finding someone to whom to present the form. when leaving iad, the office collecting the form was not in the main terminal, so leave time to deposit the thing.
The OP indicates they are carrying funds back to the US, so they will hand the form to CBP directly. There would just be questions I'd assume, but it's not illegal and you should not be stopped for doing (and declaring) the funds.
As far as the tax implications, why is everyone harping on that aspect as the OP said they pay taxes, and there is nothing wonky about the funds.