(1) Beginning in tax year 2028 with taxes due in 2029, to avoid taxing the same Washington taxable income under the business and occupation tax or public utility tax and the tax imposed under this chapter, a nonrefundable credit is allowed against taxes due under this chapter on income that is also subject to the tax imposed under chapter 82.04 or 82.16 RCW. The credit is equal to the amount of tax paid under chapter 82.04 or 82.16 RCW for income included in both the calculation of the tax paid under chapter 82.04 or 82.16 RCW and the tax imposed under this chapter.(2) The credit under this section is earned in regard to income reportable for federal income tax purposes and may be claimed against taxes due under this chapter, for the taxable year in which the income is reportable for federal income tax purposes. The credit claimed for a taxable year may not exceed the tax otherwise due under this chapter for that taxable year. Unused credit may not be carried forward or backward to another tax reporting period. No refunds may be granted for unused credit under this section.[ 2026 c 238 s 204.]Notes:Findings—Intent—Effect of invalidation of 2026 c 238 s 201—Automatic expiration date and tax preference performance statement exemption—Necessity of act—Intent—Implementation by department of revenue—2026 c 238: See notes following RCW 82A.04.030.