@simransz-Recently my parents returned to Nepal and they had 3 laptops  of friends and families with them and i don think so they were charged for it .. but they had to open and show to the airport security personnels in every transit -a little bit of tough time .. i don know whther u dont get trouble putting into your main luggage... so don worry about paying custom for at least less than 3 laptops( MY EXPERIENCE)..Happy homegoing:)