If you owe the state of Kansas, you would need to mail in your payment with your payment voucher.  Most states include the mailing address on the payment voucher.  Kansas is the only state for which the address is not listed on the voucher.  If you need to make a payment to Kansas for an amount due, mail your payment and voucher to:

KANSAS INCOME TAX
KANSAS DEPARTMENT OF REVENUE
915 SW HARRISON ST
TOPEKA KS 66699-1000

If you have a payment due to any other state, the mailing address will be available on the voucher that will print with the rest of your return when you click Print Accepted Return