You would enter this in your tax return using TurboTax Premier. The sale of a timeshare would be considered as a second home.
Indicate if you ever used the property for business or as a rental. You are not able to take the loss on the sale if it was used for personal reasons.
Do I need to upgrade to a premier turbo tax to deal with the proceeds from selling my timeshare. If anything I have a capital loss based on the original cost/closing fees and 15 years of other capital & replacement fees.