James Widtfeldt appeals the district court’s 1 dismissal of his pro se action, in which he alleged, among other things, that defendants attempted to violate a tax court order by pursuing tax collection against him. He sought damages and injunctive relief. Upon careful review, see Pagonis v. United States, 575 F.3d 809, 812 (8th Cir. 2009), we conclude that dismissal was proper: sovereign immunity shields defendants from Widtfeldt’s claim for money damages, see F.D.I.C. v. Meyer, 510 U.S. 471, 474, 114 S.Ct. 996, 127 L.Ed.2d 308 (1994), and his attempt to enjoin tax collection is prohibited by the Anti-Injunction Act, see 26 U.S.C. § 7421(a). Accordingly, we affirm.