This service allows you to pay your Illinois State taxes electronically and is a service of Value Payment Systems. All payments are processed immediately and the payment date is equal to the time you complete your transaction. We accept MasterCard, Visa, Discover and American Express. Your Convenience Fee will be based on the payment type you select. The fee amount will be a flat rate of $3.75 for debit card transactions up to $400.00, or 1%, of the tax payment amount for payments over $400.00. The fee amount will be 2.25% (minimum $3.75) of the tax liability for credit cards.