What Research Standards Must Credentialed Tax Preparers Meet?
Credentialed tax preparers answer to three overlapping standards, and all three turn on the same question: how strong is the authority behind the position? Circular 230 (31 CFR Part 10) governs how you conduct yourself before the IRS. IRC 6694 sets the penalty you pay personally when a position is unreasonable. IRC 6662 sets the accuracy-related penalty that lands on your client. None of these is a memory test. Each one asks whether you researched the position, found supporting authority, and can show your work. That makes credential compliance a research-and-documentation discipline before it is anything else.
Three standards that run on the same evidence
A CPA, an Enrolled Agent, and an Annual Filing Season Program participant carry different practice rights, but the standards governing return positions converge. Circular 230 applies to anyone who practices before the IRS. IRC 6694 applies to anyone paid to prepare a return. IRC 6662 applies to the taxpayer but flows directly from the preparer's work. Three regimes, three enforcers, one underlying file: the research that supports each position.
The Office of Professional Responsibility (OPR) enforces Circular 230 through censure, suspension, or disbarment from IRS practice, and it publishes those disciplinary actions in the Internal Revenue Bulletin. The IRS enforces 6694 with money. The taxpayer absorbs 6662. The same weak position can trigger all three at once, and they do not coordinate their timing. A practitioner who signs a return without checking current authority is exposed on every front simultaneously. The defense against all three is identical, which is the reason to treat them as one standard instead of three.
The credentials and who sets their rules
The three credentials that carry preparer responsibilities differ in practice rights and in who writes their continuing-education rules. The return-position standards above apply to all of them without adjustment.
| Credential | Practice rights before the IRS | Continuing-education authority |
|---|---|---|
| CPA | Unlimited representation | State board of accountancy (NASBA standards) |
| Enrolled Agent | Unlimited representation | Circular 230 Section 10.6 (IRS) |
| AFSP participant | Limited representation, returns they prepared | Annual IRS continuing-education package |
Unlimited representation means a CPA or EA can represent any taxpayer, before any IRS office, on any matter. An AFSP participant, who is not credentialed, can represent only clients whose returns they prepared, and only before certain IRS functions. The research standard does not bend to the practice right. A position has to clear reasonable basis whether a CPA, an EA, or an AFSP participant signs the return. Meeting that standard consistently is a matter of having the research tools an enrolled agent or CPA actually needs.
What Circular 230 asks of every practitioner
Three sections carry most of the weight, and they apply whether you hold a CPA license or an EA credential.
Section 10.22 requires due diligence as to accuracy in preparing returns and in determining the correctness of any representation made to the Treasury Department. Section 10.34 sets the position standards: a practitioner may not sign or advise a position that lacks a reasonable basis, and the section ties directly to IRC 6694(a)(2) and 6694(b)(2). Section 10.35 requires competence, the knowledge, skill, and preparation needed for the matter at hand, and it tells you to either acquire that competence or refer the work to someone who has it.
The due diligence checklist for paid preparers turns these sections into a repeatable seven-step process. The standards themselves are short. Meeting them on every engagement is the actual work.
The authority ladder
Every position sits somewhere on a confidence ladder, and the rung determines what you can do with it.
Reasonable basis is the floor, roughly a one-in-five chance of success on the merits. A position below this should not appear on the return. Substantial authority sits higher, often described as a 40 percent likelihood. An undisclosed position needs to reach it to protect the client from the IRC 6662 accuracy-related penalty. More-likely-than-not, better than 50 percent, is required for tax shelter and reportable-transaction positions.
The penalty those rungs guard against is real money. The accuracy-related penalty under 6662 is 20 percent of the underpayment attributable to the position (Treasury Regulation 1.6662-2), and it applies to a substantial understatement of income tax as defined in Treasury Regulation 1.6662-4. Substantial authority for an undisclosed position keeps that 20 percent off the client's bill. When a position clears reasonable basis but not substantial authority, disclosure on Form 8275 (or Form 8275-R for positions contrary to a regulation) protects both the client and the preparer. Placing a position on this ladder is itself a research conclusion. You cannot locate the rung without reading the authority, and you cannot defend the placement later without recording what you read. The authority hierarchy determines which sources carry binding weight and which are only persuasive.
One position, three standards
Take a question that comes up constantly: does a consulting business qualify for the Section 199A qualified business income deduction, or is it a specified service trade or business (SSTB) that phases out at higher income? The answer turns on Treasury Regulation 1.199A-5, which defines the SSTB categories and applies them to the facts.
Now watch the three standards stack on that single position. Circular 230 Section 10.34 says you may not sign the return claiming the deduction unless the position has a reasonable basis. IRC 6694 says that if the position is unreasonable and produces an understatement, you personally owe the greater of $1,000 or 50 percent of the fee. IRC 6662 says the client owes a 20 percent penalty on the resulting underpayment unless the position had substantial authority. One memo, citing 1.199A-5 and applying it to the client's specific facts, answers all three. No memo, and you are exposed on all three the moment the return is examined. That convergence is the entire case for treating research as the foundation of credential compliance rather than a separate chore.
What the preparer penalty actually costs
IRC 6694 is the section that makes this personal. Under 6694(a), a position that is unreasonable (no substantial authority undisclosed, or no reasonable basis with disclosure) and produces an understatement exposes the preparer to a penalty equal to the greater of $1,000 or 50 percent of the income derived from preparing the return. Under 6694(b), willful or reckless conduct raises that to the greater of $5,000 or 50 percent of the income derived. The penalty attaches to the preparer, not the client.
The escape hatch is written into the statute. A 6694(a) penalty does not apply if there was reasonable cause for the understatement and the preparer acted in good faith. Reasonable cause is a documentation question. A preparer who researched the position, identified the authority, and reached a defensible conclusion has the record to claim it. A preparer working from memory does not. Documenting research for a malpractice insurance audit builds the same file that answers a 6694 inquiry.
Staying competent: continuing education by credential
Competence under Section 10.35 is not a one-time test. The credentials enforce it through continuing education, and the requirements differ.
Enrolled Agents follow Circular 230 Section 10.6. The rule sets a minimum of 72 hours of continuing education per three-year enrollment cycle, with at least 16 hours in any single year and two hours of ethics or professional conduct each year, which works out to six hours per cycle. Section 10.9 governs which providers and programs qualify. CPAs answer to their state board of accountancy and, in most states, to NASBA self-study standards, which carry their own hour counts and reporting cycles. AFSP participants complete an annual continuing-education package to earn the record of completion and limited representation rights.
The credential sets the hour count. The research habit is what makes those hours productive. Using primary-source research for self-study credit shows how the reading you already do for client work can feed qualifying education instead of sitting separate from it.
When a position is challenged
Standards stay theoretical until a return is examined. The standard you met at filing becomes evidence later.
If the IRS proposes an adjustment and the case reaches the Office of Appeals, the contemporaneous research memo is the strongest exhibit you have. Appeals weighs the hazards of litigation, and a documented substantial-authority position changes that calculation. The reasonable-cause defense to a 6662 penalty, and the IRC 6751(b) requirement that a supervisor approved the penalty in writing, both turn on a written record. Defending a research memo in an Appeals conference walks through how the file holds up under questioning.
This is why credential compliance and research are the same project. The memo you write to meet Section 10.22 today is the memo that defends the position at Appeals three years from now.
The bottom line
Three standards, one file. A credentialed preparer who researches each position, places it on the authority ladder, and records the work has met Circular 230, positioned the client under 6662, and built the 6694 reasonable-cause defense in a single step. The preparer who skips the research has failed all three the moment a position is questioned.
For CPA firms, the practical move is a single research standard that every preparer follows, regardless of credential, so the research file looks the same across the firm. Tax Orator indexes Circular 230, the Internal Revenue Manual, Treasury Regulations, and the preparer-penalty rules in one place. The Discovery plan gives you 10 free queries to pull the authority behind your next position.