most ofquestions about Zorn's lemma include the tag axiom-of-choice?
(If some kind of consensus on this is reached, the clarification should be incorporated into the tag-excerpt and tag-wiki.)
EDIT: Since it seems that my formulation was rather unfortunate and might lead to confusion. When I write questions about Zorn's lemma, you should read this in the way such that questions about axiom of choice would mean questions deserving axiom-of-choice tag. (I have tried to expand more on this below.)
I have removed the phrase most of from my original formulation - as Asaf's answer shows, it seems as if my suggestion was something like: Whenever ZL appears in a question, this tag should be added. This was not what I intended to say.
We know that ZL and AC are equivalent statements. So my take on this that a question which would be tagged axiom-of-choice if all occurrences of ZL in the question were replaced by AC, then it seems to be reasonable to tag this question by axiom-of-choice as well. (Of course, replacing ZL by AC might render the question nonsensical, I just mean that in principle relevance of ZL to the question might grant using this tag if relevance of AC would.) In the past, I have added the tag axiom-of-choice to a few questions because ZL was very relevant to that question.
The same argument could apply to well-ordering principle, although I'd say we have less questions where WO is an important part of the question.
FWIW there was a suggestion to have tag called (choice-principles) some time ago, see here. The way I understood it, it was meant for questions about weaker version of AC. But the tag was quickly removed and it was suggested to use axiom-of-choice instead.