An election on Form 8832 to change an entity's classification can take effect no earlier than:
A Form 8832 election can be effective up to 75 days before the filing date and no more than 12 months after it. After a change in classification, another change generally cannot be made for 60 months. Late election relief is available under Rev. Proc. 2009-41 in some cases. Source: Treas. Reg. 301.7701-3(c)(1)(iii)-(iv); Form 8832 instructions. Tax year: 2025 (law as of 31 Dec 2025).
Assuming an election can reach back to the start of any tax year.
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