You can reduce what you owe in property taxes. Property tax exemptions, exclusions and lowered tax rates are based on how you use your property.Learn how to contract with Hennepin County and find requirements for operating a business including building permits, licenses, recycling, and property. Features on the portal include online application and renewal forms, electronic payment options, license look-up links, and detailed contact information. The Declaration of Personal Property Form is due November 1st each year. The forms are mailed out to the last known address in September. Property tax statements. Hennepin County mails property tax statements in March.