Where are you looking for it?
Anyway, http://windows.microsoft.com/en-us/windows-8/add-view-manage-devices-printers might help.
I bought a new laptop, Llenova yoga2 pro with windows 8.1 which does not have a network cable connection. So I am on wireless. But I cannot see the brother mfc7820N printer on the network which can be seen from my husband's desktop with cable network connection. Help please.