Tax/tæks/ Definition 1 of 4Pro Tip 1/3Government Funding Taxes are essential for public services like roads, schools, and healthcare. Road maintenance is funded by vehicle tax. Pro Tip 2/3Mandatory Payment Paying tax isn't optional; not paying can lead to legal trouble. She was audited for not declaring her taxes correctly. Pro Tip 3/3Types of Tax There are various taxes such as on income, purchases (sales tax), and property. Sales tax is added at the checkout.