Rev. Proc. 2011-18, 2011-5 I.R.B. 443
Internal Revenue Bulletin 2011-9 · 2026-10-03 edition · updated 2026-10-04 · United States
2006-44
Modified by
Ann. 2011-6, 2011-4 I.R.B. 433
2006-56
Modified by
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