Treasury Regulations (26 C.F.R.)
26 CFR § 31.6402(a)-3 — (a)-3 Refund of Federal unemployment tax.
Any person who pays to the district director more than the correct amount of—
(a) Tax under section 3301 of the Federal Unemployment Tax Act or a corresponding provision of prior law, or
(b) Interest, addition to the tax, additional amount, or penalty with respect to such tax,
Source: official text