Louisiana Revised Statutes Tit. 47, § 120.3. Refunds and credits

A. An overpayment shall bear no interest if credit is given therefor. Amounts actually refunded as overpayments shall bear interest at the rate established pursuant to Civil Code Article 2924(B)(3) per year computed from ninety days after the filing date of the return showing the overpayment or from the due date of such return, whichever is later.

B. The secretary may net any overpayments against the corporation franchise taxes for the purpose of determining the interest due under the provisions of R.S. 47:1601.