Increasing a population limit on counties that may use tourist development tax revenues for certain uses; extending the timeframe within which certain changes to property damaged or destroyed by Hurricane Michael must commence to prevent the assessed value of the property from increasing; revising the deadlines for applying for additional ad valorem tax exemptions for certain servicemembers for a specified tax year; authorizing a property appraiser in a county for which the Governor has declared a state of emergency to post notices of proposed property taxes on its website if mailing the notice is not possible; providing sales tax exemptions for certain clothing, wallets, bags, school supplies, personal computers, and personal computer-related accessories during a certain timeframe; providing sales tax exemptions for certain disaster preparedness supplies during a certain timeframe, etc.