K.S.A. 79-306 requires all taxable personal property to be listed, by the taxpayer, on a rendition (also referred to as a 'statement') and filed with the county appraiser on or before March 15th of each year, or the next following business day, if such date falls on a day other than a regular business day. Oil and gas renditions are to be filed on or before April 1st.
The county appraiser may extend the March 15th deadline if the taxpayer submits a request in writing, stating just and adequate reasons for the extension, and is received by the county appraiser on or before the March 15th due date, April 1st for oil and gas renditions. (K.S.A. 79-1422 K.S.A. 79-332a and K.S.A. 79-1457)