I just mailed my tax return yesterday. I just realized that I added my wife's married name on my tax return. Her ITIN doesn't have her married name. I read somewhere that IRS computer system checks first 4 letters of last name. My wife has 3 last names now. For example, Costa Lima Brown, does IRS check first 4 letters on Costa or married name - Brown? I fear that they may reject my return because I added my wife's married name.
I will have to send a letter and documentation to IRS for name change.