Requires a municipal entity that hires or retains a municipal advisor to publish a contract in a prominent location on the municipal entity's website. Modifies the amount of supplemental wagering tax that the treasurer of state is required to pay to the riverboat operating in Gary and the distribution of wagering tax revenue to the city of Gary. Provides that the Lake County Convention Center Authority is established upon the substantial completion of the convention and event center. Establishes an alternative procedure for certain school corporations to issue refunding bonds. Requires state agencies and political subdivisions to cooperate with the state GIS officer in preparing a statewide base map. Eliminates the requirement that the department of local government finance (DLGF) work with the office of technology or another organization that is part of a state educational institution for purposes of posting information on the Indiana transparency website and submitting forms regarding data for local units. Allows a person to satisfy any notice statute by publishing notice in specified forms of media and modifies related provisions regarding notice by publication. Provides that in assessing or reassessing land, the land shall be assessed as agricultural land regardless of who owns the property or who is liable for the property taxes. Modifies procedures as to the reporting of assessment values of real and personal property and parcel level data. Changes the deadline for a county to submit to the DLGF data regarding real property, personal property, and geographic information system information. Requires the purchaser of a mobile home to process the paperwork with the bureau of motor vehicles to transfer the title into the purchaser's name within 90 days of the sale. Specifies eligibility for certain townships to petition for an increase to the maximum property tax levy for the firefighting and emergency services fund. Makes procedural changes for civil taxing units not subject to levy limits. Provides that certain local property tax credits result in a reduction of property tax collections in a political subdivision in which such a credit is applied. Specifies the procedures for the submission of certain forms and related allocation amounts with regard to various allocation areas. Amends various tax increment financing allocation area provisions, including provisions to redefine "residential property" and to require the original owner of certain nonowner-occupied residential property in an allocation area to enter into a written agreement with the appropriate entity to pay the property taxes for the portion of outstanding bonds until the bonds are retired. Changes reporting requirements by governing bodies to the DLGF regarding guaranteed savings contracts and energy efficient programs used by school corporations. Provides that the property tax rate for the levy imposed for the replacement of fire protection territory equipment is considered part of the maximum permissible ad valorem property tax levy and may not exceed $0.0333 per $100 of assessed value. Extends a temporary increase in the capitalization rate percentage under the statewide agricultural land base rate determination. Requires the DLGF to annually publish on the Indiana Register the adjusted cost estimate threshold for certain local public work projects. Provides a real and personal property tax exemption for Indiana nonprofit senior living communities beginning with property taxes that are first due and payable in 2027. Adds the Indiana Historical Society, Inc. to a list of organizations exempt from property taxation. Allows certain taxpayers to retroactively file a property tax exemption application. Increases the amount of the property tax deduction for a model residence and a residence in inventory to 100% of the assessed value of the property for each deduction. Increases the number of model residences and residences in inventory from three to ten that may be claimed for purposes of those property tax deductions. Requires an individual to reside on the real property, mobile home, or manufactured home to be eligible for the over 65 property tax credit. Increases the property tax deduction for a veteran who is totally disabled to 100% of the assessed value of the individual's real property (instead of $14,000). Expires property tax deductions for certain veterans, and instead provides a property tax liability credit. Restores the property tax deduction available to a surviving spouse of a World War I veteran that was limited by SEA 1-2025. Provides, if a taxpayer claims the homestead deduction for property that is not eligible for the deduction, that the taxpayer shall (instead of may) be liable for any additional taxes that would have been due on homestead property plus a civil penalty. Requires the county auditor to include in a notice of tax due a 10% fine as a penalty for claiming the homestead deduction falsely, which is in addition to all other penalties for which the taxpayer is liable. Allows the executive of Miami Township in Cass County to submit a petition to the DLGF requesting an increase in the township's maximum permissible ad valorem property tax levy for property taxes first due and payable in 2027. Requires the Hancock County fiscal body to adopt a resolution to allow a one time transfer of money from the library property tax replacement fund. Provides that for purposes of fixing and reviewing budgets, tax rates, and tax levies, before a county auditor makes an amendment, the county auditor must provide written notice to the county fiscal body, the DLGF, and the fiscal officers of the affected taxing units. Provides that the DLGF may not approve the budget for a political subdivision until an attestation statement concerning the uploading of contracts is submitted. Allows a school corporation to allocate the effects of supplemental homestead credits granted for property taxes first due and payable in 2026 proportionately among all the school corporation's property tax funds. Requires certain qualified data center users to enter into an agreement with local officials before the qualified data center user may use a specific transaction award certificate. Adds a provision regarding repayment in the redevelopment tax credit. Specifies eligibility and procedures for a health reimbursement arrangement income tax credit. Moves the effective date for the local income tax changes enacted in SEA 1-2025 from 2028 to 2029. Makes corresponding changes to move the expiration date regarding a county with a single voting bloc enacted in HEA 1142-2025. Specifies procedures for the imposition of local income taxes and distribution of local income tax revenue. Removes provisions enacted in SEA 1-2025 providing for the expiration of local income tax expenditure rates for counties or municipalities that fail to adopt an ordinance to renew an existing expenditure tax rate. Provides that the county may determine an allocation method for revenue raised from a tax rate for fire protection or emergency medical services. Provides that the county and certain township fire departments must receive an allocation of revenue raised from a tax rate for fire protection or emergency medical services. Provides a formula for the distribution of revenue from the local income tax rate imposed by a county for certain small cities and towns. Specifies procedures for determining population for purposes of a municipal local income tax rate. Specifies that taxing units may deposit distributions of excise tax revenue in any fund maintained by the taxing unit. Allows each county to establish a local strategic taskforce to negotiate and determine certain maximum local income tax rates. Allows the Marshall County jail fund to be used for costs otherwise incurred for the operation of the county jail. Provides that distributions of certain excise tax revenue to a taxing unit may be deposited in any fund maintained by the taxing unit and may be used for any purpose allowed by law. Makes numerous changes and additions to the local innkeeper's tax and food and beverage tax statutes, including new food and beverage tax authorizations, modifications to distributions of innkeeper's tax revenue, and revisions to the composition of various innkeeper's tax boards and commissions. Replaces the definitions of "manufactured home" and "mobile home" throughout the Indiana Code with a singular definition. Subject to an exception, limits voting eligibility in a homeowners association to members of the homeowners association who use their property as a homestead as to certain matters. With certain exceptions, prohibits a unit from adopting or enforcing an ordinance, resolution, regulation, policy, or rule that prohibits or restricts an owner of a privately owned residential property from using the property as a rental property. Retroactively amends the definition of "short term rental" to specify that certain private, owner occupied businesses are excluded from that definition. Requires a person appointed to a fire protection district board of trustees to reside in the fire protection district. Sets forth an alternative procedure that may be used to appoint the board of trustees of certain fire protection districts. Specifies maximum property tax rates for certain fire protection territories. Revises a provision of the municipal Barrett Law concerning deferred installments. Amends provisions in the drainage law as to bidding on certain projects and the term of loans. Authorizes the budget agency, subject to budget committee review, to augment the state agency contingency fund appropriations in HEA 1001-2025 through July 1, 2027, in an amount not to exceed $40,000,000 for Indiana office of technology contracts, in addition to the uses for the appropriation authorized in HEA 1001-2025.