Yes, since you scheduled your payment on a Saturday, it's not likely to be processed until later today. Tax payments get processed Monday through Friday, not on weekends and not on holidays. Follow this link to learn more about the timing of tax payments.
If your payment still hasn't been processed tomorrow, you can call the number in the link above to see if the payment is still pending, or needs to be rescheduled. You will see the number in the paragraph titled Cancellations, errors and questions.
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