If you hold a US Green Card, you can be deported for willfully filing a false tax return (or for aiding and abetting the filing of a false tax return), and, perhaps for willfully failing to file a so-called FBAR. The United States Supreme Court issued a decision on this very matter just last year.
Summary of Kawashima v. Holder
• A Japanese resident alien couple were convicted under the US tax laws for willfully filing a false tax return or aiding and abetting the filing of such a return
• They appealed their deportation under the Immigration and Nationality Act (8 U.S.C. §1227(a)(2)(A)(iii)) as aliens who had been convicted of a so-called “aggravated felony” based on their conviction.
• The United States Supreme Court, held that the crime of willfully making and subscribing a false tax return and the crime of willfully aiding and assisting the preparation of a false tax return are deportable offenses under the Immigration and Nationality Act. Read more