You can buy the tickets on line thats the best option
Entrance in the front of the building
Walk around to the side entrance, located in the parking garage. You above the long lines at the main entrance. walk to the left when facing the museum, all the way to the end.
You can buy it in the lobby
If you live in NY go online make a reservation and then pay what you want when you get there. Must show ID with address.
There are automated ticketing kiosks in the lobby now. You must buy a ticket and have it scanned at the entrances to the exhibition halls.
https://engage.metmuseum.org/admission/?promocode=43184
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