Imagine you want to send a letter to your friend who lives far away. You put the letter inside an envelope, write your friend's address on it, and stick a special little sticker on the top right-hand corner of the envelope. That little sticker is called a postal tax stamp.
The postal tax stamp is important because it helps pay for the cost of delivering your letter to your friend's home. When you buy the stamp, you are basically paying a small fee to cover the cost of the postal service. Without those fees, it would be much harder for the postal service to operate and deliver all of the letters and packages people send every day.
So, next time you are sending a letter or a package, don't forget to buy a postal tax stamp to help support the postal service and ensure your item gets delivered to its destination!