(1) As used in this section, the term:(a) “Household” means a person or group of persons living together in a room or group of rooms as a housing unit, but the term does not include persons boarding in or renting a portion of the dwelling.
(b) “Household income” means the adjusted gross income, as defined in s. 62 of the United States Internal Revenue Code, of all members of a household.
(2) In accordance with s. 6(d), Art. VII of the State Constitution, the board of county commissioners of any county or the governing authority of any municipality may adopt an ordinance to allow either or both of the following additional homestead exemptions:(a) Up to $50,000 for a person who has the legal or equitable title to real estate and maintains thereon the permanent residence of the owner, who has attained age 65, and whose household income does not exceed $20,000.
(b) The amount of the assessed value of the property for a person who has the legal or equitable title to real estate with a just value less than $250,000, as determined in the first tax year that the owner applies and is eligible for the exemption, and who has maintained thereon the permanent residence of the owner for at least 25 years, who has attained age 65, and whose household income does not exceed the income limitation prescribed in paragraph (a), as calculated in subsection (3).
(3) The $20,000 income limitation shall be adjusted annually, on January 1, by the percentage change in the average cost-of-living index in the period January 1 through December 31 of the immediate prior year compared with the same period for the year prior to that. The index is the average of the monthly consumer-price-index figures for the stated 12-month period, relative to the United States as a whole, issued by the United States Department of Labor.
(4) An ordinance granting an additional homestead exemption as authorized by this section must meet the following requirements:(a) It must be adopted under the procedures for adoption of a nonemergency ordinance specified in chapter 125 by a board of county commissioners or chapter 166 by a municipal governing authority, except that the exemption authorized by paragraph (2)(b) must be authorized by a super majority (a majority plus one) vote of the members of the governing body of the county or municipality granting such exemption.
(b) It must specify that the exemption applies only to taxes levied by the unit of government granting the exemption. Unless otherwise specified by the county or municipality, this exemption will apply to all tax levies of the county or municipality granting the exemption, including dependent special districts and municipal service taxing units.
(c) It must specify the amount of the exemption, which may not exceed the applicable amount specified in subsection (2). If the county or municipality specifies a different exemption amount for dependent special districts or municipal service taxing units, the exemption amount must be uniform in all dependent special districts or municipal service taxing units within the county or municipality.
(d) It must require that a taxpayer claiming the exemption for the first time submit to the property appraiser, not later than March 1, a sworn statement of household income on a form prescribed by the Department of Revenue.
(5) The department must require by rule that the filing of the statement be supported by copies of any federal income tax returns for the prior year, any wage and earnings statements (W-2 forms), any request for an extension of time to file returns, and any other documents it finds necessary, for each member of the household, to be submitted for inspection by the property appraiser. The taxpayer’s sworn statement shall attest to the accuracy of the documents and grant permission to allow review of the documents if requested by the property appraiser. Once the documents have been inspected by the property appraiser, they shall be returned to the taxpayer or otherwise destroyed. Annually, the property appraiser shall notify each taxpayer of the adjusted income limitation set forth in subsection (3). The taxpayer must notify the property appraiser by May 1 if his or her household income exceeds the most recent adjusted income limitation. The property appraiser may conduct random audits of the taxpayers’ sworn statements to ensure the accuracy of the household income reported. If selected for audit, a taxpayer shall execute Internal Revenue Service Form 8821 or 4506, which authorizes the Internal Revenue Service to release tax information to the property appraiser’s office. All reviews conducted in accordance with this section shall be completed on or before June 1. The property appraiser may not grant the exemption if the required documentation requested is not provided.
(6) The board of county commissioners or municipal governing authority must deliver a copy of any ordinance adopted under this section to the property appraiser no later than December 1 of the year prior to the year the exemption will take effect. If the ordinance is repealed, the board of county commissioners or municipal governing authority shall notify the property appraiser no later than December 1 of the year prior to the year the exemption expires.
(7) Those persons entitled to the homestead exemption in s. 196.031 may apply for and receive an additional homestead exemption as provided in this section. Receipt of the additional homestead exemption provided for in this section shall be subject to the provisions of ss. 196.131 and 196.161, if applicable. (8) If title is held jointly with right of survivorship, the person residing on the property and otherwise qualifying may receive the entire amount of the additional homestead exemption.
1(9)(a) If the property appraiser determines that for any year within the immediately previous 10 years a person who was not entitled to the additional homestead exemption under this section was granted such an exemption, the property appraiser shall serve upon the owner a notice of intent to record in the public records of the county a notice of tax lien against any property owned by that person in the county, and that property must be identified in the notice of tax lien. Any property that is owned by the taxpayer and is situated in this state is subject to the taxes exempted by the improper homestead exemption, plus a penalty of 50 percent of the unpaid taxes for each year and interest at a rate of 15 percent per annum. Before any such lien may be filed, the owner must be given 30 days within which to pay the taxes, penalties, and interest. Such a lien is subject to the procedures and provisions set forth in s. 196.161(3). (b) If the additional homestead exemption under this section is improperly granted as a result of a clerical mistake or omission by the property appraiser, the person who improperly received the exemption may not be assessed a penalty and interest. Back taxes shall apply only as follows:1. If the person who received the additional homestead exemption under this section as a result of a clerical mistake or omission voluntarily discloses to the property appraiser that he or she was not entitled to the homestead exemption before the property appraiser notifies the owner of the mistake or omission, no back taxes shall be due.
2. If the person who received the additional homestead exemption under this section as a result of a clerical mistake or omission does not voluntarily disclose to the property appraiser that he or she was not entitled to the homestead exemption before the property appraiser notifies the owner of the mistake or omission, back taxes shall be due for any year or years that the owner was not entitled to the limitation within the 5 years before the property appraiser notified the owner of the mistake or omission.
3. The property appraiser shall serve upon an owner that owes back taxes under subparagraph 2. a notice of intent to record in the public records of the county a notice of tax lien against any property owned by that person in the county, and such property must be identified in the notice of tax lien. The property appraiser must include with such notice information explaining why the owner is not entitled to the limitation, the years for which unpaid taxes are due, and the manner in which unpaid taxes have been calculated. Before any such lien may be filed, the owner must be given 30 days within which to pay the taxes, penalties, and interest. Such a lien is subject to the procedures and provisions set forth in s. 196.161(3). 
