I can't find anything in the rule that would support one way or the other, but I would probably include it as an escrow item. Essentially, anything that is paid into escrow in my mind would appear in the escrow field, even if it could also be a fee or charge (which is not defined in TILA for closed-end credit). That's my gut gess at least.
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My opinion, take it for what its worth. Opinions expressed are my own and not those of my employer and are not legal advice.