Confirm that the State Tax Account ID number that identifies your state is correct via the state's tax website. E.g. The Massachusetts state website is Or The New Jersey state website is

Please enter your identification number that was assigned to you by your individual state.

If you have obtained the correct number with the state and need to add it within Aatrix, you can do so by going through the Aatrix verification grid and selecting Edit > Company Setup from the menu bar.