Gov. Jan Brewer and some Arizona lawmakers are determined to pass her plan to simplify the state’s tax code this year, but municipalities are just as determined to delay at least one portion of the governor’s proposal that they argue could do irreparable harm to their finances.

Arizona retailers are planning to increase the pressure on lawmakers to force online retailers to collect state sales tax.

The Arizona Retailers Association is concocting a public-relations campaign to intensify awareness and garner support for an online sales tax.

The Senate today rebuffed a proposal to require online retailing giant Amazon.com to collect taxes on products it sells to Arizona residents. The measure, SB1338, was defeated by a vote of 8 to 20.

The Arizona Senate has postponed a vote scheduled Wednesday on a bill to require Amazon.com to collect sales tax on purchases made by Arizona residents.