Where do I find the form to fill out to send to heirs listed in a will?

This is not a DIY project.  Contact a probate lawyer practicing in the county in which your mother died.

Please accept my condolences on the loss of your mother. What you are looking for is part of a petition to probate a Will. There are a few different versions of that petition, and which one you should use differs depending on the situation. No one can give you advice as to which form you should use without knowing way more facts than can or should be posted on this kind of public forum. However, if you want to see what forms are available, you can go to the website for the Council of Probate Court Judges in Georgia (I assume this is a Georgia estate, since that's the location given for your post, but if not the Georgia forms won't be what you need). Here is the website: https://georgiacourts.gov/probate/ PLEASE consider hiring a probate attorney to help you. The attorney can point out pitfalls and steps that you can take to make the whole process as smooth as possible. Many probate attorneys will help on a fairly limited, inexpensive basis, getting you the information you need to do most of the work on your own, if fees are a concern. The money spent can be well worth it.