The "Extend" button has been removed from New York.

The documentation here is not correct and an internal Documentation Request to reflect this has been made:

https://docs.servicenow.com/bundle/newyork-it-service-management/page/product/contract-management/task/t\_ExtendAContract.html

Renewals are done through "Renew" UI action and as an extension of a Contract is an adjustment of the contract dates. Such modifications are performed through the "Adjust" UI action.

Hope that helps!

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