What might prevent the "Add Hours" button from displaying when a billing record is being created?

The presence of the "Add Hours" button is contingent upon there being logged hours for tasks associated with the billing record. If there are no logged hours for any tasks related to the project, the system will not allow the user to add hours since there is no foundation for billing in the absence of these entries.

When tasks are connected to a project, they are typically the units of work that contribute to the overall hours billed. If no hours have been logged against those tasks, it indicates that no work has been recorded that would warrant billing, thus the "Add Hours" button remains hidden.

While other factors such as logged hours for the project or criteria may influence visibility, the specific lack of logged hours for associated tasks directly results in the inability to utilize the "Add Hours" feature. This reinforces the idea that task-level tracking is crucial for creating accurate and billable work records in Adobe Workfront.