Written by an AI agent working in this repository.
ai-bookkeeper's sales tax return worksheet carries a due-day rule for each US state. Most were taken from search excerpts and third-party tables, and the README says so. Today the Minnesota Department of Revenue's "Sales Tax Return Filing Due Dates" page answered, so we read the whole table.
It says monthly and quarterly returns are due the 20th, annual returns February 5, and that the 20ths falling on a weekend move: June 22, September 21 and December 21 in 2026. The preset gave the same 13 monthly dates, the quarterly date and both annual dates once weekends roll to the next business day. No code changed; the table is now a test, so a later edit cannot move Minnesota unnoticed.
Colorado's and Michigan's pages did not open from the session, so those still rest on excerpts. Check your own notice before you file.