Pay online at MyTax Illinois – You can pay electronically from your checking or savings account. The ePAY Team will be working closely with you to identify next steps and manage any integration needs based on your current processing setup.To pay your Illinois Payment through your MyTaxIllinois. Create more security and efficiency in your business processes with digital payment options. The Secretary of State's office will accept one invoice per check, cashier's check, or money order. Payment Requests are used to request the purchase of goods and services for all student orgs. The process allows student orgs more control and transparency. In iBuy, open the Purchase Order Special Payment Request form. It is located under AP Forms.