Complete the Tax Exemption Application(PDF, 139KB) and make 6 copies. Download and fill out this Application for Exemption of Real Estate Taxation form.To request an exemption: Complete the form linked above. Act 50 – Homestead Tax Exemption. Application available through Allegheny County. Local Services Tax Exemption Certificate and Refund Form. Are you Exempt from Paying the Local Services Tax? Complete this form, including your signature. 2. Local Services Tax (LST) Forms. LST Exemption Certificate ; New Businesses.