If the due date for filing a payment falls on a weekend or holiday when is the payment due? The payment is due the following business day by midnight (Central Time). March 30, 2017 12:04 Related articles When is sales tax due? When will my payment process? Do I have to make a payment on a return at the same time I file the return? I filed my return today. Do I have to pay the same day? Will TNTAP confirm my successful payment?