XML Tax Standards
  Glossary of XML Terms

2-D Bar Code Standards Including Vendor ID Codes - 2010 Final
 updated October 31, 2010
 [more on 2-d bar code standards]

Electronic Funds Transfer (EFT)
  TXP Tax Payment Banking Convention - Format and Explanation
  TXP Tax Type Codes and Amount Type Codes

Wireless Communications Sourcing Standards

Standards Development

Third Party Payment (TPP) Addenda - Proposal to NACHA
  [Submitted September 2011]

NACHA IAT Implementation Information for States

Fed-State E-File Modernization - StateMeF.com

2-D Barcode Standards Development

[Latest Standards Development Meetings]

Other Information

Electronic Commerce Best Practices [Sept 2000]

Tax Information Group for EC Requirements Standardization [TIGERS]