AZ SB1143

Defines "internal revenue code" for Arizona tax purposes as the U.S. Internal Revenue Code of 1986 as amended and in effect on January 1, 2018, for taxable years 2017-2018, including retroactively effective provisions from the Bipartisan Budget Act of 2018 and Consolidated Appropriations Act of 2018.

Reduces Arizona individual income tax rates by 0.11 percentage points for taxable year 2018 only, after which standard rates under A.R.S. § 43-1011 resume.

Applies retroactively to tax returns filed for taxable years beginning after December 31, 2017.

Automatically repeals on December 31, 2019.

Designated as an emergency measure effective immediately upon enactment.