26 CFR § 1.183-4 - Taxable years affected.

---
identifier: "/us/cfr/t26/s1.183-4"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "26 CFR § 1.183-4 - Taxable years affected."
title_number: 26
title_name: "Internal Revenue"
section_number: "1.183-4"
section_name: "Taxable years affected."
chapter_name: "INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY"
subchapter_number: "A"
subchapter_name: "INCOME TAX"
part_number: "1"
part_name: "INCOME TAXES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "26 U.S.C. 7805, unless otherwise noted."
regulatory_source: "T.D. 6500, 25 FR 11402, Nov. 26, 1960; 25 FR 14021, Dec. 21, 1960; T.D. 9989, 89 FR 17606, Mar. 11, 2024, unless otherwise noted."
cfr_part: "1"
---


# 1.183-4 Taxable years affected.

The provisions of section 183 and the regulations thereunder shall apply only with respect to taxable years beginning after December 31, 1969. For provisions applicable to prior taxable years, see section 270 and § 1.270-1.

[T.D. 7198, 37 FR 13685, July 13, 1972]