Section 11-12A-24 - Repeal of article and date thereof; short taxable years for taxpayers on calendar or fiscal year and cash or accrual accounting methods(a) Each and every provision of article twelve-a of this chapter is repealed for all tax periods beginning on and after the first day of July, one thousand nine hundred eighty-seven: Provided, That tax liabilities, if any, arising for taxable years or portions thereof ending prior to the first day of July, one thousand nine hundred eighty-seven, shall be determined, administered, assessed and collected as if the taxes imposed by article twelve-a of this chapter had not been repealed; and the rights and duties of the taxpayer and the state of West Virginia shall be fully and completely preserved.(b) Persons who are calendar year taxpayers under this article shall file their annual return for calendar year one thousand nine hundred eighty-seven, on or before the fifteenth day of September, one thousand nine hundred eighty-seven, and remit the amount of any taxes shown thereon to be due, unless an extension of time for filing is authorized by the tax commissioner.(c) Persons who are fiscal year taxpayers shall similarly file an annual return on or before the fifteenth day of September, one thousand nine hundred eighty-seven, for their short taxable year which ended the thirtieth day of June, one thousand nine hundred eighty-seven, and remit the amount of any taxes shown thereon to be due, unless an extension of time for filing is authorized by the tax commissioner.(d) Persons who keep their records using the accrual method of accounting shall file their annual return for the full or short taxable year ending the thirtieth day of June, one thousand nine hundred eighty-seven, computing their tax liability under such method. A taxpayer shall file an amended return for such year and pay any additional taxes due within thirty days after determining that gross income was under-reported on such annual return, or that any allowable deductions were over-reported.(e) Persons who keep their records using the cash method of accounting may file their annual return for the full or short taxable year ending the thirtieth day of June, one thousand nine hundred eighty-seven, computing their tax liability under such method: Provided, That such a taxpayer shall file a supplemental return for such year within one month after the close of each calendar quarter during which he received gross income for any activity or portion thereof completed prior to the first day of July, one thousand nine hundred eighty-seven, and pay any additional taxes shown on the supplemental return to be due. The purpose of this requirement is to minimize the advantage or disadvantage associated with the different methods of accounting when the carrier income tax is repealed.