Rolling trailing 12 month average

Hi OhLookAnError ,

Based on the information you provided, I am not sure what kind of error you encountered during the process. What is your reported error, can you attach a screenshot of the error or provide a pbix file without privacy?

Here is the version of my Power BI Desktop:

Below is the screenshot and pbix file of my reproduction:

How to Get Your Question Answered Quickly - Microsoft Fabric Community

If it does not help, please provide more details with your desired out put and pbix file without privacy information.

^{Best Regards,}

^{Yifan Wang}

^{If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.}