When the company’s financial year coincides with the calendar year, the tax credit defined in article 244 quater L is deducted from the corporation tax due by the company in respect of the financial year during which it complied with the conditions set out in this article. If the financial year ends during the year, the tax credit is deducted from the corporation tax due in respect of the financial year ending during the year following that in which the company complied with the conditions set out in article 244 quater L. If the amount of the tax credit exceeds the amount of tax due in respect of the said financial year, the excess is refunded.