Can AI prepare tax returns accurately?
Accuracy depends on architecture. General chatbots score 23–42% on independent tax benchmarks; purpose-built systems that read source documents score far higher — Filed scored 94% line-by-line on TaxCalcBench.
It depends entirely on how the AI is built. General-purpose chatbots like ChatGPT, Claude, and Gemini answer from training data and score just 23–42% on TaxCalcBench, an independent tax-accuracy benchmark. Purpose-built systems that read the actual source documents and cross-reference them against the return score far higher — Filed scored 94% line-by-line on the same benchmark.
The takeaway for firms: 'AI accuracy' means little without knowing the architecture. Ask whether the tool reads source documents or just predicts answers. See the full accuracy benchmarks.