Real estate fiscal
No. If you sell your property during the year, you cannot obtain a reduction in your property tax in proportion to the number of months during which you occupied the property.
In fact, as the owner on January 1st of the tax year, you are legally liable for the property tax for the entire year.
In practice, when signing the deed of sale, you can agree with the purchaser that he/she will reimburse you for the property tax corresponding to the months following the purchase (for the calculation you can base yourself on the property tax notice of the previous year).