Complete Deal with NCR is a quest in Fallout 2.
One must talk to President Tandi, informing her that the squatters at Vault 15 will cooperate with the NCR, and accept their presence. Afterward, Zeke receives a new house, the squatters will have access to food and water, and the NCR launches its expansion campaign in Northern California. This is the penultimate step in the overarching Retrieve Parts/Gain Access to Vault 15 quest.
After completing this quest, Zeke may say that he does not have enough food to survive, even if the NCR helped the squatters.
If one retrieves the computer parts from Vault 15 without having completed the deal with NCR first, they won't be able to do this quest, as they can no longer speak to Tandi. [verified]