Understanding how customs work with laptops

I am thinking of carrying a laptop in my suitcase. Let's forget for a minute the risk that an unprotected laptop may encounter while in the suitcase and focus on my question, please:

If I have understand correctly, when I reach Europe (and not when I leave USA), I will have to declare my laptop (purchased in USA). However, if it is in the suitcase how will I do that?

I mean, my feeling is that I leave the aircraft, go inside the airport's building, pass the check (verify that I a European, etc.), then I pick up my suitcase and I am gone.

So when does the custom appear? My feeling is that it appears during the check phase..I seem confused.

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Can you bring a laptop in your carry on?

TSA Laptop Rules Neither the TSA nor the airlines give much guidance on packing a computer. You can pack a laptop or even a desktop computer in your carry on or checked bags.

Do I have to declare my laptop at customs UK?

Where individuals are travelling between the UK and EU with a laptop with a value of \xa31500 or less, a declaration can be made orally or by conduct. That is to say, by speaking to a Customs officer or walking or driving through the 'green channel' at the port or airport.

Can you bring a laptop across the border?

The short answer is, no. Customs and Border Protection do not need a warrant or probable cause to search your phone or laptop. Since 2013, the Department of Homeland Security has claimed legal authority to search your electronic devices without a warrant or probable cause at the U.S. border or international airports.

Why do airports need to check laptops?

The Transportation Security Administration requires that all laptops be taken out of carry-on bags and passed through scanners on their own. The rule allows screeners to get an unimpeded look at each computer, which might help them discern whether it contains hidden explosives.

How does Customs work?

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

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