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SEC. 4. PROCEDURE
Internal Revenue Bulletin 1998-52 · 2026-10-03 edition · updated 2026-10-04 · United States
.01 Additional disclosure of facts relevant to, or positions taken with respect to, issues involving any of the items set forth below is unnecessary for purposes of reducing any understatement of income tax under § 6662(d) provided that the forms and attachments are completed in a clear manner and in accordance with their instructions. The money amounts entered on the forms must be verifiable, and the information on the return must be disclosed in the manner described below. For purposes of this revenue procedure, a number is verifiable if, on audit, the taxpayer can demonstrate the origin of the number (even if that number is not ultimately accepted by the Internal Revenue Service) and the taxpayer can show good faith in entering that number on the applicable form.
(1) Form 1040, Schedule A, Itemized Deductions:
(a) Medical and Dental Expenses: Complete lines 1 through 4, supplying all required information.
(b) Taxes: Complete lines 5 through 9, supplying all required information. Line 8 must list each type of tax and the amount paid.
(c) Interest Expense: Complete lines 10 through 14, supplying all required information. This section 4.01(1)(c) does not apply to (i) amounts disallowed under § 163(d) unless Form 4952, Investment Interest Expense Deduction, is completed, or (ii) amounts disallowed under § 265.
(d) Contributions: Complete lines 15 through 18, supplying all required information. Merely entering the amount of the donation on Schedule A, however, will not constitute adequate disclosure if the taxpayer receives a substantial benefit from the donation shown. If a contribution of property other than cash is made and the amount claimed as a deduction exceeds $500, a properly completed Form 8283, Noncash Charitable Contributions, must be attached to the return. This section 4.01(1)(d) will not apply to any contribution of $250 or more unless the contemporaneous written acknowledgment requirement of § 170(f)(8) is satisfied.
(e) Casualty and Theft Losses: Complete Form 4684, Casualties and Thefts, and attach to the return. Each item or article for which a casualty or theft loss is claimed must be listed on Form 4684.
(2) Certain Trade or Business Expenses (including, for purposes of this section 4.01(2), the following six expenses as they relate to the rental of property):
(a) Casualty and Theft Losses: The procedure outlined in section 4.01(1)(e) above must be followed.
(b) Legal Expenses: The amount claimed must be stated. This section 4.01(2)(b) does not apply, however, to amounts properly characterized as capital expenditures, personal expenses, or nondeductible lobbying or political expenditures, including amounts that are required to be (or that are) amortized over a period of years.
(c) Specific Bad Debt Charge-off: The amount written off must be stated.
(d) Reasonableness of Officers’ Compensation: Form 1120, Schedule E, Compensation of Officers, must be completed when required by its instructions. The time devoted to business must be expressed as a percentage as opposed to “part” or “as needed.” This section 4.01(2)(d) does not apply to “golden parachute” payments, as defined under § 280G. This section 4.01(2)(d) will not apply to the extent that remuneration paid or incurred exceeds the $1 million employee remuneration limitation, if applicable.
(e) Repair Expenses: The amount claimed must be stated. This section 4.01(2)(e) does not apply, however, to any repair expenses properly characterized as capital expenditures or personal expenses.
December 28, 1998 24 1998–52 I.R.B.
(f) Taxes (other than foreign taxes): The amount claimed must be stated.
(3) Form 1120, Schedule M-1, Reconciliation of Income (Loss) per Books With Income per Return, provided:
(a) The amount of the deviation from the financial books and records is not the result of a computation that includes the netting of items; and
(b) The information provided reasonably may be expected to apprise the Internal Revenue Service of the nature of the potential controversy concerning the tax treatment of the item.
.02 Determination of standard mileage rates. The business, medical, and moving standard mileage rates reflected in this revenue procedure are based on an annual study of the fixed and variable costs of operating an automobile conducted on behalf of the Service by an independent contractor, and the charitable standard mileage rate is provided in § 170(i) of the Internal Revenue Code. In connection with its study, the contractor has suggested that a change be made to the study methodology regarding the business standard mileage rate. This suggested change would include the cost of personal rather than business automobile insurance because taxpayers who use the business standard mileage rate generally carry personal rather than business insurance on their automobiles. Had it been adopted, this suggested change would have further decreased the business standard mileage rate for 1999. The Service is currently reviewing this suggested change for purposes of determining the business standard mileage rate for the year 2000.
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