AI tax research, citation accuracy, and the workflows that hold up under review. Written for CPAs, EAs, and tax attorneys.
Most 'best AI tax tool' lists rank features. The only question that reorganizes the whole list is where the citations come from. Here is the 2026 landscape sorted by that line — general assistants, incumbent platforms, AI-native research, and the grounding layer — with a rubric for choosing.
ChatGPT will hand you a confident citation to a Code section that does not exist. Here is the mechanism behind the fabrication, why tax citations are uniquely exposed to it, and the four habits that catch it before it reaches a client.
A research memo is only as good as its weakest cite. Here is a division of labor that lets AI carry the drafting while primary authority carries the law, walked through a full §280A home-office memo you can copy.