Address Validation + Zip4 - Sales Tax Web Service API

The Address Verification Edition is MOST accurate sales tax web service. The address is validated using address matching and data standardization technology and then mapped to the zip+4 for the most accurate tax information.

Address is validated by USPS CASS certification and mapped to the zip+4 for the most accurate tax information. This web service return address information including the street address, city name, state abbreviation, 5 digit zip code and the +4 zip code. The tax information returned includes the taxing jurisdiction information, FIPS codes, the general sales and use tax rates at the state, county, city, SPD, MTA, other1-4, totals, reporting codes, min and max taxes, effective dates, and more.

The data returned will include the following information:

Is Address Exists? Zip Code Plus 4
Address1 Address2 Address3
City Name State Name CRT
DP Digits Congress District UPS Rural
Zip Code
State Abbreviation
County Name
City Name
State FIPS Code
County FIPS Code
City FIPS Code
FIPS Geocode
State Effective Date
County Effective Date
City Effective Date
MTA Effective Date
SPD Effective Date
Other1 Effective Date
Other2 Effective Date
Other3 Effective Date
Other4 Effective Date
Total Sales Tax
Total Use Tax

County Sales Tax
City Sales Tax
MTA Sales Tax
SPD Sales Tax
Other1 Sales Tax
Other2 Sales Tax
Other3 Sales Tax
Other4 Sales Tax
State Sales Tax
State Use Tax
County Use Tax
City Use Tax
MTA Use Tax
SPD Use Tax
Other1 Use Tax
Other2 Use Tax
Other3 Use Tax
Other4 Use Tax
County Reporting Code
City Reporting Code
MTA Name
MTA Number
SPD Name
SPD Number
Other1 Name
Other1 Number
Other2 Name
Other2 Number
Other3 Name
Other3 Number
Other4 Name
Other4 Number
County Tax Collected by
City Tax Collected by
County Taxable Max
County Tax over Max
City Taxable Max
City Tax Over Max
Tax Shipping Alone?
Tax Shipping and Handling Together?


WSDL : http://services.taxdataservice.com/USAddressVerificationZip4.svc?wsdl

WSDL : http://services.taxdataservice.com/USAddressVerificationZip4.asmx

Required Information: Registered TaxDataService UserID and Password.

Sample Source Code

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Desktop Lookup Tool

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Additional Documentation

This document contains example input/output for the Sales and Use Tax Basic Web service.

Affordable Pricing

Product Name LookUps Plan Term LookUp Rate($) Overage Rate($) Price($)
AddrVerify+Zip4-100 100 Monthly 0.0990 0.1320 9.90 Try Buy
AddrVerify+Zip4-500 500 Monthly 0.0900 0.1200 45.00 Try Buy
AddrVerify+Zip4-1000 1,000 Monthly 0.0849 0.1132 84.90 Try Buy
AddrVerify+Zip4-5000 5,000 Monthly 0.0800 0.1066 399.00 Try Buy
AddrVerify+Zip4-10000 10,000 Monthly 0.0799 0.1065 799.00 Try Buy
AddrVerify+Zip4-50000 50,000 Monthly 0.0700 0.0933 3500.00 Try Buy
AddrVerify+Zip4-1000 1,000 Yearly 0.8400 0.1132 79.00 Try Buy
AddrVerify+Zip4-10000 10,000 Yearly 0.7990 0.1065 749.00 Try Buy

Online Lookup Tool

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General Information