If you imported the W-2 or if you received it by other means and that box was checked, you need to leave it checked. If it's not supposed to be checked, then you need to contact the employer ASAP to have them issue a corrected W-2. Otherwise, not entering the W-2 "exactly" as printed could result in issues with the IRS. Not sure if that particular box would cause an issue. Just can't rule it out.
