In July, Gov. Jan Brewer celebrated the announcement that Amazon.com was planning to open a new distribution center in the state, calling the move proof that Arizona is open for business.

Now, lawmakers are telling Amazon that since they have distribution centers here, they should be required to collect and pay sales tax to the state.

The mixed message is the latest chapter in a long-standing battle between online giants and brick-and-mortar retailers — and one that isn’t likely to be settled any time soon.

Shoppers who dodge sales taxes by turning to the Internet may see their options begin to narrow if a measure in the Arizona Senate becomes law.