About Form 1099S, Proceeds from Real Estate Transactions. More In Forms and Instructions.To claim the exemption, the homeowner must make a one-time filing with the county assessor where the property is located. File Form 1099S, Proceeds From Real Estate Transactions, to report the sale or exchange of real estate. Sign the form and have it notarized. If you pay either type of property tax, claiming the tax deduction is a simple matter of itemizing your deductions on Schedule A of Form 1040. Filing a homestead declaration typically requires three steps. Complete a homestead declaration form. Step 1: Complete the Required Forms. Evaluate if you qualify for a Homestead Exemption.