MEMORANDUM **

David R. Mills and Morena I. Mills appeal pro se from the Tax Court’s decision *952 sustaining a notice of federal income tax deficiency for tax years 2004 and 2005 and imposing a penalty. We have jurisdiction under 26 U.S.C. § 7482(a)(1). We review de novo the Tax Court’s conclusions of law and for clear error its factual findings. Smith v. Comm’r, 300 F.3d 1023, 1028 (9th Cir. 2002). We affirm.

The Tax Court properly sustained the Internal Revenue Services’ deficiency determinations based on the Mills’ original returns. See Fayeghi v. Comm’r, 211 F.3d 504, 507 (9th Cir. 2000) (IRS may, as a matter of internal administration, decide to accept amended returns for limited purposes, but it is not statutorily required to do so, or to treat amended return as superseding an original return).

We do not consider matters not specifically and distinctly raised and argued in the opening brief. See Padgett v. Wright, 587 F.3d 983, 985 n. 2 (9th Cir. 2009) (per curiam).

The Mills’ remaining contentions are unpersuasive.

AFFIRMED.