Federal housing law
0720 Publ 5433-A (PDF)
Federal housing law as enacted — verbatim and citable.
- Edition
- 2026-10-03
- Last updated
- 2026-10-04
- Jurisdiction
- United States
Official source: IRS Forms, Instructions & Publications (https://www.irs.gov/pub/irs-pdf/p5433a.pdf), retrieved 2026-10-03. U.S. Government work (17 U.S.C. § 105).
and at Work¶
A five-part series from the IRS and Security Summit partners¶
Use multi-factor authenti- cation options whenever possible to prevent identity thieves from gaining access to client accounts. Starting in 2021, all tax software providers will be required to offer multifactor authentication options to their products.
A multi-factor or two-factor authentication offers an extra layer of protection for the username and password used by the tax professional. It often involves a security code sent via text.
Practitioners can download to their mobile phones readily available authenti- cation apps offered through Google Play or the Apple Store. These apps will generate a security code. Use your search engine for “Authentication apps” to learn more.
Publication 5433-A (7-2020) Catalog Number 74735K Department of the Treasury Internal Revenue Service www.irs.gov