Painfully this will fall to the court decide and create the precedence here. If this is an official government app, then the onus probably is on the government to provide correct information? Who knows, it could go either way and the courts could say "you're on the hook".

I don't think we have a good answer for liability here, like for Tesla FSD, Waymo, or even the current frontier models.

The Supreme Court has already held that a government agent giving someone bad advice about the law is not an excuse (unless it rises to the level of “affirmative misconduct”): https://supreme.justia.com/cases/federal/us/450/785/#tab-opi...