<prompt> Human: I need to bring 40K into the US and Im aware that its substantial to the point where I have to declare it over 10K. I wont be bringing it by cash so it wont be declared at the airport. I was thinking a bank transfer but do I have to notify the IRS before or after?  <response>: There is no requirement to declare wire transfers. So just do a wire transfer and be done with it. 