I left off a detail in the results section of a manuscript that's been accepted. How do I remedy this? In a manuscript recently accepted to a journal, I just realized I neglected to mention that I centered a variable for an analysis. How crucial is this detail to correct, and what's the best way to go about doing it?
I can't speak to the specifics of the correction you need to make, but in general, I would think that you make the change as you revise it for the final version, and note the change in the cover letter to the editor.  If it is something significant enough that it could affect the decision to accept, the editor might send it back to reviewers to confirm.