Two people who never sign a partnership agreement can still owe a Form 1065. Federal tax classification follows conduct and default rules, not the label on the sign.
Before you prepare any business return, you need to know what the entity is for federal tax purposes, because that answer decides which return is filed and how the income is taxed. Every business question on this exam starts with that one determination. State law creates the organization. Federal law then classifies it.
Think of classification as a stack with three levels:
- State-law form. This is how the business was organized under state law: a sole proprietorship, general partnership, limited partnership, limited liability company, or state-law corporation.
- Federal default classification. Treas. Reg. §301.7701-3 assigns this automatically, unless the business makes an election that overrides it.
- Regime. This is the set of federal tax rules that applies: Subchapter C, Subchapter K, Subchapter S, disregarded, or exempt under §501.
A single-member limited liability company (LLC) shows how one organization sits at all three levels at once.
Common mistakes
- Applying the $600 Form 1099-K threshold. OBBBA restored the test of $20,000 and 200 transactions. A platform that processed $14,000 across 180 transactions for a seller issues nothing.
- Deducting hobby expenses up to hobby income. That rule ended after 2017. A hobby with $9,000 of receipts and $11,000 of costs reports $9,000 of other income and deducts nothing.
- Getting a new EIN for an S election. A corporation that elects S status keeps its number. Only a genuine change of entity, such as a sole proprietorship incorporating, requires a new one.
Bottom line
- Default classification: one owner is disregarded, two or more is a partnership, incorporated is a per se corporation; Form 8832 overrides, Form 2553 does both steps at once.
- Form 2553 is due by the 15th day of the 3rd month of the election year; the 60-month rule blocks a second classification change absent a greater-than-50% ownership shift.
- A QJV under §761(f) is available only to a jointly filing married couple who both materially participate, and generally not to a state-law LLC outside community property states.
- A new EIN follows a change in entity type, not a change of name, address, or S election; Form 8822-B reports a responsible party change within 60 days.
Exam shortcut
Read the stem for the entity's state-law form first, then count owners, then look for an election. That order answers most classification questions before you reach the choices. Stem signals worth memorizing. "Husband and wife, both work in it, no other owners" points to the QJV election. "Incorporated under the laws of" kills every check-the-box answer.
The full lesson (about 6,316 words, 42 min read) adds 2 worked examples, all 6 common mistakes, a self-check, free in the app.
Learning objectives
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