Transaction date of Harris County Tax Office online payment portal; transaction date of telephone payment. Q. Where can I pay my property taxes?The Harris County Delinquent Tax Sale is the monthly public auction of real estate for past due property taxes. 1 of this year (Tax. Code Section 22.01). The due date for filing a property tax return with your county tax officials is January 1 and April 1 unless otherwise indicated. It may take 1 to 2 business days once a document has been processed for recording to be reflected in the search inquiry. All property is taxable unless federal or state law exempts it from the tax. Search personal property records in Mecklenburg County. JP Courts Online Ticket Payments Pay your Harris County ticket using MasterCard, Visa, American Express, Discover or a valid checking account.