Just wanted to know an effective and easy home remedy to instantly remove tan.

Hahaha, you think there is ANYTHING that removes a tan?

There isn't... you stay out of the sun as much as possible, and use a VERY high SPF sunscreen and other means to prevent UV from penitrating your skin... and then after many months it will go away. But there exists NOTHING that will instantly remove a tan.

Ya but there are some home remedies available over the net, like applying lemon, honey and so on. So I was really confused whether these things are really effective or not.

Most home remidies are bogus, or at best only mildly effective... some are actually dangerous.. (speaking in general terms).. NONE will remove a tan.

THe skin pigmentation is inside the skin cells.....not on the outside of them much less on the outside of your epidermis.