2026 US tax deadlines for Form 1040, 1040NR, expats, and estimated taxes. Key IRS dates, extensions, and penalty rules explained.

IRS-approved Certified Acceptance Agent for ITIN without mailing passport. Global US tax filing, FATCA, FBAR & expat tax services worldwide.

Apply for an ITIN for spouse of U.S. citizen to file joint 1040, claim tax credits, open bank accounts, and ensure IRS tax compliance.