43-901 - Arizona Statutes

43-901. Accounting period and method Taxable income shall be computed upon the basis of the taxpayer's annual accounting period, fiscal year or calendar year as the case may be in accordance with the method of accounting regularly employed in keeping the books of such taxpayer. If no such method of accounting has been so employed or if the method employed does not reflect the proper income, the computation shall be made in accordance with such method as in the opinion of the department does reflect the proper income. If the taxpayer's annual accounting period is other than a fiscal year or if the taxpayer has no annual accounting period or does not keep books, the taxable income shall be computed on the basis of the calendar year.