Q.WHAT PLANT IS THIS?
Hi, Can you help identify this plant? Heavily notched leaves. Perennial.
anemone? rodgersias? astilbe?
Thanks.
Linda

This can be difficult. A location or growing zone can help with identification.
This leaf structure can match many plants. Stink Currant came to mind when I saw your plant.
I would suggest taking a sample to your County Extension Office.
If it is a local native plant they can help with identification.
Here is also a link to help you locate your nearest office.
https://www.gardeningknowhow.com/extension-search/