If you're trying to go through customs at an airport, you might say something pke:
"Hi, I'm a tourist. Can you help me with customs?"
"I have some items to declare. Where do I go?"
"Do I need to fill out any forms before going through customs?"
"I'm travepng with a passport. Can I use the automated kiosk to go through customs?"
It's always a good idea to be popte and respectful when speaking with customs officials, as they are there to help ensure the safety and security of the country.