Tax Payment Due Date. Make online payments including parking notices, water bills, special assessments and more.Easily and securely pay your tax online with your credit card, an electronic check (ACH debit), or other electronic options. You may search and pay for Traffic and Criminal cases. You will need your court case number, citation number, or driver's license number to find your case. Salt Lake County accepts three forms of payment for paying online. Currently, utilizing the e-Check method is free. By mail: Download payment form and follow instructions provided. You need to file in the right justice court. File in the: City or town justice court if they have one, and.