Allegheny County has contracted with FORTE to offer individuals and businesses the opportunity to pay real estate taxes directly over the internet. The Office of Property Assessments provides property assessments, handles tax abatements and exemptions, coordinates assessment appeals, and more.If you received a Notice of Business Use Tax Due from the Department of Revenue, you can file your return and make payment at mypath.pa. Gov(opens in a new tab). Looking for information on properties in Allegheny County? For any questions, call 412-255-2525 Option 2 for Business Tax. The Alleghany County Tax Office is responsible for the assessing, listing and collection of tax for all real and personal property located within the County. Fifty cents and above should be rounded to the next highest dollar. All owners of real estate located within the City and School District. Business License Tax: The Commissioner of the Revenue administers an annual tax on businesses located in the County.