Features

Positive Identification of County

This optional DynamicZip™ feature when used with the ZIPsales™ ZIP+4 file provides a way to positively identify the Tax Location county. ZIP codes can cross county lines. The ZIP code with the +4 extension does not cross county lines, and can be used to determine the county in this situation.

NOTE: If your addresses don't include the +4 extension, then the functionality added by the +4 feature is of no value. This feature does not calculate the +4 extension for you.

Statistics from 2002

This situation exists in almost every state. The 10 states most affected are (in descending order): TX, IL, IA, MO, OH, GA, IN, MN, KS, and PA. With the ZIP+4 feature operational, DynamicZip™ can pinpoint the exact county for any ZIP code for which you enter the +4 extension. At the time these calculations were made, 10.5% of the ZIP codes cross county lines where at least one of the counties has a county sales tax.

Factors to consider

• The DynamicZip Tax Schedule Selection Select Default option without the ZIP+4 option should result in selecting the correct county at least 95% of the time.
• Typical processes used to obtain the +4 extension also return the USPS City Name. This can result in decreased accuracy in regards to the city portion of the tax.

Requirements

• You must optain registration keys from Kamp-Data that enable this optional feature.
• The ZIPsales™ Plus4.txt file must exist in your ZIPsales Import folder when you import the ZIPsales Database.