Webassistance available february 8 through april 5, 2023 harnett county residents can get their tax returns prepared free on wednesdays, february 8 through march 1 and march. Webfree tax services are available from february 8 through april 4. Harnett county public library in partnership with campbell university school of business, will provide free tax. Webthe tax department is responsible for listing, appraising and assessing all real estate, personal property and registered motor vehicles within harnett county. Webthe tax department is responsible for listing, appraising and assessing all real estate, personal property and registered motor vehicles within harnett county.