Every year, the county where you live will send you a tax bill. This bill is from the Appraisal District in your county. For Mabank, TX it will either be Henderson County, Kaufman County, or Van Zandt County. Some residents in each of those counties are a part of Mabank and Mabank ISD serves them. So, to answer your question, you pay your Mabank, TX school taxes as a part of your annual tax bill from your county. Since Mabank TX schools are in Henderson County, you will most likely be receiving a tax bill from Henderson County as well as from the county where your property is located. So, if you are in Mabank, and live in Kaufman County, you will receive a tax bill from Henderson County as well as Kaufman County.