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Some further searching led to at least one additional result. In addition to Suburban Computer Services (http://www.suburbancomputer.com/tips_state_tax.php http
by dahjelle 16y ago
Some further searching led to at least one additional result. In addition to Suburban Computer Services (http://www.suburbancomputer.com/tips_state_tax.php http://www.suburbancomputer.com/tips_state_tax.php), there is the Symmetry Tax Engine (https://www.symmetry.com/pages/ste.php https://www.symmetry.com/pages/ste.php). It's not a web service, but rather a library that you can integrate into your application. Pricing starts at $17,500 for up to 50,000 W-2s.
- dahjelle 16y agoCaliber Technology (http://www.taxupdate.com/overview.php http://www.taxupdate.com/overview.php) also appears to offer a similar product for Java/C# platforms.