Yarrow is a plant genus with 85 species so your plant may very well be a yarrow. Many members of that species feature aromatic leaves. Begin your hunt by checking out yarrow species.
Many online sites can help you identify your plant. The USDA's site for the Natural Resources Conservation Service, Better Homes and Gardens, and many others will help you identify your plant. Also, there are numerous plant identification books.
Of course, there is also an app for that! PlantNet and Leafsnap are just two that allow you to photograph your plant with a smartphone to find an answer.