Louisiana Revised Statutes Tit. 47, § 93. Period for which deductions and credits shall be taken

A. Except as hereinafter provided in this Section, the deductions and credits provided for in this Chapter shall be taken for the taxable year in which “paid or accrued” or “paid or incurred,” dependent upon the method of accounting upon the basis of which the net income is computed, unless in order to clearly reflect the income the deductions or credits should be taken as of a different period.

B. The proper year in which to claim deductions for federal income and excess profits taxes allowable under the provisions of R.S. 47:55 shall be determined as follows, regardless of the method of accounting regularly employed by the taxpayer:

C. If a deduction is claimed and allowed in any period, the same deduction cannot again be claimed in a subsequent period in which it otherwise would be properly deductible, unless the taxpayer, prior to the running of prescription with respect to the first period, shall have amended his return for that period so as to eliminate the deduction and shall have paid any additional tax which may be due as a result thereof, together with any interest and penalties that may be applicable thereto.