When and Where To File. You can get information about your property tax benefits, including: Application status, Current benefit amounts, Proposed benefit for the upcoming tax year.Taxpayers can complete transactions on MyTax DC or call 202-727-4TAX. The Homestead Declaration is filed using Form HS-122, the Homestead Declaration, and Property Tax Credit Claim. Notify the Property Appraiser to cancel the exemptions on your former home. Taxpayers who are selling their home may qualify to exclude all or part of any gain from the sale from their income when filing their tax return. Disabled applicants must complete form DTE 105E,.