You can read about what each council does on the Our Responsibilities page.
If your query is highways related we would recommend using Love West Sussex. Here is a link to the webpage where you can also download the app. https://love.westsussex.gov.uk/reports/home
The Love West Sussex site allows you to inform WSCC of any highways issues such as potholes, overgrown vegetation, damaged kerbs, footpaths and verges which you come across in the county. If you use the Love West Sussex site or app you will be able to check on the progress of your report and any work being undertaken.
If you query relates to waste (including dog waste bins), parking, planning, noise or nuisance we would recommend contacting Horsham District Council. Here is a link to their website https://www.horsham.gov.uk/
Find out more about your Parish Councillors and the Parish Office TeamREAD MORE
Find the Parish Council Policies and Henfield Parish Council's Public Open DataREAD MORE
Find out about the role of the Parish Council and the other Local Authorities, Horsham District Council and West Sussex County CouncilREAD MORE