E-Tax refers to the electronic system used for filing taxes online. It allows individuals and businesses to submit their tax returns and payments through secure websites, making the process faster and more efficient. This system often provides features like automatic calculations and easy access to tax forms, reducing the need for paper documentation. Many countries have adopted E-Tax systems to streamline tax collection and improve compliance. For example, the Internal Revenue Service (IRS) in the United States offers an E-Tax option for taxpayers, enabling them to file their federal income taxes electronically. This innovation helps reduce errors and speeds up refunds.