Run the federal substantial-presence arithmetic and identify exceptions that need professional review.
Change any input. The result updates in your browser and is not sent to Incolator.
This checks U.S. federal alien tax residency only—not immigration status, state domicile, treaty residence, or filing position.
Important: This is a general educational planning tool. It does not create legal rights, make an official determination, or replace a current quote, signed agreement, government instruction, or advice from a qualified professional who knows your facts and jurisdiction.
Primary reference: IRS substantial presence test. Rules, thresholds, rates, and forms can change; verify them before acting.