Kan. Stat. § 12-191
All retail transactions consummated within a county or city having a retail sales tax, which transactions are subject to the Kansas retailers' sales tax, shall also be subject to such county or city retail sales tax. Except as hereinafter provided, all retail sales, for the purpose of this act, shall be considered to have been consummated at the location determined by the sourcing rules as provided in K.S.A. 79-3670, and amendments thereto. The retail sales or transfer of watercraft, modular homes, manufactured homes or mobile homes, shall be considered consummated at the place of business of the retailer and sourced to such location. The retail sale, excluding the lease or rental, of motor vehicles, trailers, semi-trailers or aircraft that do not qualify as transportation equipment, as defined in subsection (d) of K.S.A. 79-3670, and amendments thereto, shall be considered consummated at the place of business of the retailer and sourced to such location. The isolated or occasional sale of any motor vehicle or trailer shall be considered consummated at the taxing jurisdiction where the sale is made. If the sale negotiations occurred in different cities or counties, the situs of the sale for local sales tax purposes shall be the place where the motor vehicle or trailer was kept at the time negotiations were first entered into. In the event the place of business of a retailer is doubtful the place or places at which the retail sales are consummated for the purposes of this act shall be determined under rules and regulations adopted by the secretary of revenue which rules and regulations shall be considered with state and federal law insofar as applicable. The director of taxation is hereby authorized to request and receive from any retailer or from any city or county levying the tax such information as may be reasonably necessary to determine the liability of retailers for any county or city sales tax. The collection of any sales tax of a county or city approved at any election shall commence on the first day of the calendar quarter next following the 90th day after the date that the city or county has provided written notice to the director of taxation of the election authorizing the levy of such tax. The collection of any such sales tax applicable to printed catalog purchases wherein the purchaser computed the tax based upon local tax rates published in the catalog, shall not commence until the first day of the calendar quarter next following the 150th day after the date that the city or county has provided written notice to the director of taxation of the election authorizing the levy of such tax. The director of taxation shall provide notice to sellers of such taxes within 30 days after receiving such notice from the city or county.
A city retailers' sales tax shall not become effective within any area annexed by a city levying such tax until the first day of the calendar quarter next following the 90th day after the date that the governing body of such city provided the state department of revenue with a certified copy of the annexation ordinance and a map of the city detailing the annexed area. The director of taxation shall provide notice to sellers of such tax within 30 days after receiving such notice from the city or county.
Whenever any sales tax, imposed by any city or county under the provisions of this act, shall become effective, at any time prior to the time that revenue derived therefrom may be budgeted for expenditure in such year, such revenue shall be credited to the funds of the taxing subdivision or subdivisions and shall be carried forward to the credit of such funds for the ensuing budget year in the manner provided for carrying forward balances remaining in such funds at the end of a budget year.
K.S.A. 12-191