A Mortgage Letter provides confirmation for your lender that your homestead exemption has been approved along with an ad valorem estimate of your tax bill. Mortgage interest can be a tax deduction if you choose to itemize deductions.A tax filer can either itemize deductions or take the standard deduction. Documentary stamp tax is an excise tax imposed on certain documents executed, delivered, or recorded in Florida. The Clerk of Court Recording Department records, indexes, and archives all documents that create the Official Records of Hillsborough County. The Clerk of Court Recording Department records, indexes, and archives all documents that create the Official Records of Hillsborough County. Completed Example of the Promissory Note. Hillsborough County Completed Example of the Promissory Note. You are not required to file this form if the interest is not received in the course of your trade or business. Looking to calculate your potential monthly mortgage payment?