Area V: Federal Taxation of Entities
Area V covers C corporations, S corporations, partnerships, LLC classification and tax-exempt organizations, with an emphasis on preparing and reviewing returns. Expect reconciliations from book to taxable income, basis roll-forwards and classification of items as ordinary or separately stated.
C corporations and book-tax differences
A C corporation pays a flat 21 percent tax on taxable income, which starts from book income and is reconciled on Schedule M-1 or, for larger corporations, Schedule M-3. Permanent differences never reverse; temporary ones do. Several deductions have corporate-only rules, and state taxation turns on nexus and apportionment.
S corporations
S status requires a small business corporation and a timely election, and it ends by revocation, by ceasing to qualify, or by excess passive income with old C earnings. Income and loss pass through, separately stated where their character matters, and shareholder basis controls both loss deductions and the taxation of distributions.
Partnerships
Partnerships file Form 1065 and pass items through on Schedule K-1. Ordinary business income is reduced by guaranteed payments, while capital gains, section 1231 items and charitable contributions are separately stated. A partner's outside basis starts with contributions and moves with income, losses, distributions and shares of partnership liabilities.
LLC classification and tax-exempt organizations
An LLC's federal tax status follows the check-the-box regulations rather than state law. Exempt organizations are classified by the Code section describing their purpose, and even exempt organizations pay tax on unrelated business income.
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