Received an IRS Notice of Deficiency (90-day letter, Letter 3219, CP3219A, or CP3219N)? The U.S. Tax Court petition deadline is generally 90 days from the notice date (150 days if addressed outside the United States). Check the date printed on the notice.
Preserve the notice and envelope, organize returns, correspondence, and supporting records, and consider qualified counsel. Brett Grendahl went Pro Se against 9 IRS attorneys in Docket 10721-24 and Respondent conceded every claim.
A Case Command consult organizes your record into a source-cited chronology. Not legal advice; no attorney-client relationship.