evidence: Millions of federal workers and military personnel would be affected by the shutdown, including about 60% of civilian federal employees, according to Andrew Lautz, senior policy analyst at the Bipartisan Policy Center. [...] The IRS has never experienced a shutdown during the filing season, Commissioner Danny Werfel told reporters in January, shortly before an earlier potential shutdown that Congress averted through a short-term funding bill. The agency would do what it could to minimize disruptions, he said at the time. In 2019, the longest government shutdown on record ended on January 25, and the tax filing season started on January 28.