Property tax may be paid in full or in two payments. The 1st half OR the full amount MUST be paid before January 1st or the whole amount of tax becomes delinquent. We cannot accept the first half payments after December 31st. If you choose to pay the first half payment by December 31st, the last half is due before April 1st. Title 68 article 2913, DUTY TO PAY TAXES-Title 68 article 2915 

Paying someone's taxes does not give you a claim or ownership interest in a property unless it's through a tax deed sale. ... Heirs with a rightful claim to the property should maintain the taxes to avoid additional penalties, fees, or it potentially going to a tax sale.