Your credit/debit card or e-check payment will post to your account the same day but will post to the Union County website the following business day. Payment made on this website will not be accepted the day of a tax sale but can be made the following day. WARNING: If you are scheduled for tax sale, make the necessary payment the day before the scheduled sale date to avoid tax sale. As part of our commitment to provide citizens with efficient, convenient service, the Union County Tax Claim Bureau has partnered with Government Software Services, Inc and AllPaid to offer payment of taxes and costs online or by telephone.