Product UpdatesBuilding Sheldon's State Tax Engine: 98% on TaxCalcBench
Deterministic rule engines for California, Illinois, New York, and Virginia - 620 of 630 scored lines on TaxCalcBench, every gap a documented benchmark defect.

Box and Dropbox integrations are live. Mention folders in chat, and formulas and tax calculations render more clearly in responses.
Welcome back to Feather Pulse. Box and Dropbox integrations are live, folder mentions landed in chat, and formulas and tax calculations render more clearly in responses.
You can now import files directly from Box and Dropbox without downloading them first. Connect your account in Settings under Integrations, then use the cloud picker in the chat composer, the Safe toolbar, or the Sources tab on any project. This completes the cloud drive rollout. Google Drive and OneDrive were already available; Box and Dropbox are now fully live, with no remaining providers in early access.
You can now @-mention an entire folder in the chat composer, not just individual files. Type @ and start typing the folder name, Feather surfaces matching folders alongside files in the dropdown. When you submit the message, Feather searches across every document inside that folder rather than requiring you to attach each file individually.
Mathematical formulas and tax calculations now display more clearly in responses. Plain text and formulas are shown together without formatting issues, so dollar amounts and calculations appear just as you expect.
That's all for this week. New here? Try Feather free, see pricing, or subscribe to the Feather Tax Brief for weekly IRS guidance. Take care!
Product UpdatesDeterministic rule engines for California, Illinois, New York, and Virginia - 620 of 630 scored lines on TaxCalcBench, every gap a documented benchmark defect.
Product UpdatesA deterministic tax calculator built on a dedicated knowledge base and AI-generated rules - and how it went from 50% to 190/190 on TaxCalcBench.
Product Updates

Written by Sokratis Vidros
Published on June 22, 2026