26 C.F.R. § 1.6012-1 — Individuals required to make returns of income

(ii) Cases where power of attorney is required. Whenever a return of income of a nonresident alien individual is made by an agent acting under a duly authorized power of attorney for that purpose, the return shall be accompanied by the power of attorney in proper form, or a copy thereof, specifically authorizing him to represent his principal in making, executing, and filing the income tax return. Form 2848 may be used for this purpose. The agent, as well as the taxpayer, may incur liability for the penalties provided for erroneous, false, or fraudulent returns. For the requirements regarding signing of returns, see § 1.6061-1. The rules of paragraph (e) of § 601.504 of this chapter (Statement of Procedural Rules) shall apply under this subparagraph in determining whether a copy of a power of attorney must be certified. (iii) Limitation. A return of income shall be required under this subparagraph only if the nonresident alien individual is otherwise required to make a return in accordance with this paragraph. (4) Disallowance of deductions and credits. For provisions disallowing deductions and credits when a return of income has not been filed by or on behalf of a nonresident alien individual, see section 874(a) and the regulations thereunder. (5) Effective date. This paragraph shall apply for taxable years beginning after December 31, 1966, except that it shall not be applied to require (i) the filing of a return for any taxable year ending before January 1, 1974, which, pursuant to instructions applicable to the return, is not required to be filed or (ii) the amendment of a return for such a taxable year which, pursuant to such instructions, is required to be filed. For corresponding rules applicable to taxable years beginning before January 1, 1967, see 26 CFR 1.6012-1(b) (Revised as of January 1, 1967).

(c) Cross reference (c) Cross reference. For returns by fiduciaries for individuals, estates, and trusts, see § 1.6012-3.