My last experience with an X'd card at IAD left me never wanting to see one again. And it was a simple error at the kiosk rather than me wanting to declare something. 30+ minutes later, I cleared immigration after no one could figure out why I needed to see them in the other room. In light of that, please bear with me as I try to reconstruct what I am supposed to do when I want to bring a lot of booze in. [at IAD for example]
1. At the kiosk, make sure that I check that I am exceeding the duty free limit and get my X'd card
2. Walk to baggage claim and find my hard shell full of booze [yea for me!]
3. Show my X'd card to customs agent on the way out and explain that I am declaring said booze.
4. Hopefully get an ok and walk on out. Alternatively, get sent to pay duty and then walk out.
Is that about it?
Cheers -