Certified GKH Gardening Expert
Impatiens are annuals and need to be replaced each year. However, these flowers propagate very easy so you can always get additional plants from their cuttings. Here is an article that you may find helpful: https://www.gardeningknowhow.com/ornamental/flowers/impatiens/growing-impatiens-flowers.htm
You don't mention where you live. They are perennials in Zones 10 and 11. These are areas where there is no frost in winter. If you do not know your zone, search the internet for plant zone map.