The deadline for reporting changes to personal property listings is March 1 of each assessment year. Personal property forms, noting the information provided the previous year, are mailed to businesses in the Teton County in early December of each year. Business owners are asked to make any additions or deletions and return the form to the County Assessor. If there have been no changes, owners need only so indicate, sign and return the form. The reporting deadline may by extended to April 1 upon written request, provided that request is made no later than February 15.