Product UpdatesIntroducing Sheldon, Feather's Deterministic Tax Agent
A deterministic tax calculator built on a dedicated knowledge base and AI-generated rules - and how it went from 50% to 190/190 on TaxCalcBench.
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By Feather TeamResources & Updates
Product Updates
Tax BriefTax Brief Issue 12: New mileage rates, late-election relief
This week's IRS updates cover mid-year mileage rate changes, late-election relief for a 336(e) stock sale and a GST allocation, and a gift tax safe harbor.
TechnicalIRS OPR 2026-19: AI Hallucinations in Tax Practice (Part 2)
What AI hallucinations cost tax pros: real cases (Mata v. Avianca, Park v. Kim, Deloitte), the warning signs, and the Circular 230 duties to verify first.
