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If a task returns a tuple, does that count as 2 task runs?

No, just 1. But note you can’t map with a tuple output

Screen Shot 2022-01-21 at 2.35.47 PM.png

For example, would this only count as 4 task runs?

The final task in that list is a parameter

<https://docs.prefect.io/api/latest/core/task.html?#task-2>
A bit about this regarding the nout= parameter I think.

<https://docs.prefect.io/core/concepts/tasks.html#multiple-return-values>

That one even states if you return multiple results it will error, but I think you are returning an actual tuple based on the above, so it should be considered one result.

Confirmed with the team that the return value of a task doesn’t dictate its number of task runs