When importing data for an employer that operates in a state that uses a specific % of income for taxation such as Arizona, and that % is populated in the census data file to be imported, assign that % with the "StateStatus".  To import the rate, use the "StateStatus" field for importing the percent. No "%" sign needed. TRAK does some work at assigning the one that is closest/best match. (For example, there is a rate of 3.6%, I had a value of "36"--TRAK matched these and had the correct rate).

Note: Arizona has specific rates that taxes can be withheld at--see here: https://azdor.gov/businesses-arizona/withholding-tax