Example: A and B are married and filed a joint 1992 Form CT-1040 showing a Connecticut income tax liability of $4,500 and payments made in connection therewith of $4,800, so that there is a joint Connecticut income tax overpayment of $300. A's Connecticut adjusted gross income of $75,000 equaled his federal adjusted gross income. B's Connecticut adjusted gross income of $25,000 equaled her federal adjusted gross income. A reported $60,000 of wages, from which $2,800 of Connecticut income tax was withheld, and $15,000 of other income. B reported $20,000 of wages, from which $1,000 of Connecticut income tax was withheld, and $5,000 of other income. A and B filed a joint Form CT-1040 ES and paid $1,000 in estimated Connecticut income tax payments. A is an obligated spouse. B, the nonobligated spouse, claims her share of the joint Connecticut income tax overpayment by attaching, as the cover page, a Form CT-8379 to the joint 1992 Form CT-1040.
B's share of the joint Connecticut income tax liability is determined by multiplying the joint Connecticut income tax liability ($4,500) by a fraction, the numerator of which is B's separate Connecticut income tax liability (as if B had not filed a joint Connecticut income tax return with A) of $535.50 and the denominator of which is the sum of each spouse's separate Connecticut income tax liability (as if a joint Connecticut income tax return had not been filed) of $3,910.50 (consisting of B's separate Connecticut income tax liability of $535.50 and A's separate Connecticut income tax liability of $3,375.00). Thus, B's share of the joint Connecticut income tax liability is $616.22.
B's contribution to the joint Connecticut income tax liability is determined by adding to B's share of the joint estimated Connecticut income tax payments the $1,000 of Connecticut income tax withheld from B's income. (Neither A nor B made separate estimated Connecticut income tax payments.) B's share of the joint estimated Connecticut income tax payments is determined by multiplying the joint estimated Connecticut income tax payments ($1,000) by a fraction, the numerator of which is B's separate Connecticut income tax liability (as if a joint Connecticut income tax return had not been filed) of $535.50 and the denominator of which is sum of each spouse's separate Connecticut income tax liability (as if a joint Connecticut income tax return had not been filed) of $3,910.50. Thus, B's contribution to the joint Connecticut income tax liability is $1,136.94 (consisting of the $1,000 of Connecticut income tax withheld from B's income and the $136.94 that is B's share of the joint estimated Connecticut income tax payments).
Ordinarily, B's share of the joint Connecticut income tax overpayment would be determined by subtracting B's share of the joint Connecticut income tax liability ($616.22) from B's contribution to the joint Connecticut income tax liability ($1,136.94); however, B's share of the joint Connecticut income tax overpayment cannot exceed the joint overpayment ($300). Therefore, B's share of the joint Connecticut income tax overpayment is $300, and A's share is $0.
Conn. Agencies Regs. § 12-732(a)-2