Section 115.4. Tax year of less than 12 months

(a) If a taxpayer has an interim tax year of less than 12 months (for example, a fiscal year taxpayer in the year 1971 or taxpayers changing over to a different accounting tax year), he shall file a declaration within the time period specified in subsection (b) if he expects his total Commonwealth taxable income to exceed $1,000. No declaration of estimated tax shall be required if the short taxable year is one of the following:

(1) A period of less than 4 months.

(2) A period of at least 4 months but less than 6 months, and the basic tax requirements are met after the first day of the fourth month.

(3) A period of at least 6 months but less than 9 months, and the requirements for filing of estimated tax are met after the first day of the 6th month.

(4) A period of 9 months or more, and the requirements for filing of estimated tax are first met after the first day of the ninth month.

(b) A declaration of estimated tax shall be filed as follows, if the requirements for filing a declaration of estimated tax are met:

(1) Prior to the first day of the fourth month of the short taxable year, the declaration shall be filed on or before the 15th day of the fourth month of such short taxable year.

(2) After the first day of the fourth month but before the second day of the sixth month, the declaration shall be filed on or before the 15th day of the sixth month.

(3) After the first day of the sixth month but before the second day of the ninth month, the declaration shall be filed on or before the 15th day of the ninth month.