State IDs for W-2s and 1099s
To input the State ID for W-2s, go to Payroll/Configure/Taxes. Look for the state "SIT" that is relevant and enter the number in the Reporting ID box. Click OK and Save.
To input the State ID for 1099s, go to Payables/Configure/Tax Authorities. Look for the relevant tax and enter the number in the Reporting ID box. Click OK and Save.
https://www.c21accountingsoftware.com/state-ID.php