Britton, et al. v. Comr., No. 09-1994, 2010 U.S. App. LEXIS 19925 (1st Cir. Aug. 24, 2010), aff'g., 132 T.C. 125 (2009)

(sole member of limited liability company liable for company's unpaid employment taxes; check-the box regulations upheld; opinion follows other circuit court opinions on the issue).