Taxation for those leaving France
You are liable for tax on everything you earned in France prior to your departure as well as on any French earnings that are taxable in France under international tax treaties that you earned after your departure.
If you live outside France, always check with the local tax authority to find out if you have filing and/or payment obligations in your country of residence, even if you pay taxes in France.
If you own property in France, you are liable for property tax and residence tax.
If a rental property is in your name as of 1 January of the year you leave France, you are liable for the residence tax.