Updated list of states that have signed the ATAT Agreement:
(Updated 4/15/06)

1. Alabama
2. Alaska
3. Arizona
4. Arkansas
5. California Franchise Tax Board
6. Colorado
7. Connecticut
8. Delaware
9. District of Columbia
10. Florida
11. Hawaii
12. Georgia
13. Idaho
14. Illinois
15. Indiana
16. Iowa
17. Kansas
18. Kentucky
19. Louisiana
20. Maine
21. Maryland
22. Massachusetts
23. Michigan
24. Minnesota
25. Missouri
26. Montana
27. Nebraska
28. New Hamphire
29. New Jersey
30. New Mexico
31. New York City
32. New York State
33. North Carolina
34. North Dakota
35. Ohio
36. Oklahoma
37. Oregon
38. Pennsylvania
39. Rhode Island
40. South Carolina
41. South Dakota
42. Tennessee
43. Texas
44. Utah
45. Vermont
46. Virginia
47. Washington State
48. West Virginia
49. Wisconsin

50. Multistate Tax Commission