The land around Tappuah belonged to Manasseh, but the town itself did not. The town of Tappuah was at the border of Manasseh’s land, and it belonged to the people of Ephraim.
The border went from Tappuah west to Kanah Ravine and ended at the sea. This is all the land that was given to the Ephraimites. Each family in that tribe got a part of this land.