Hi @Bowen, Braxton,
Thank you for posting in this community.
I would like to recommend that you use the DATEDIF function to calculate the number of days between two dates. “Today()-[Column_Name]" is not legal.
You can click on this link to see more information about the date calculation formula:
This is my modified formula:
=IF(ISBLANK([Column_Name]),"Never Certified",IF(DATEDIF(Today(),[Column_Name],"d")>=365,"Expired",IF(AND(DATEDIF(Today(),[Column_Name],"d")>=335,DATEDIF(Today(),[Column_Name],"d")<=365),"Expires Soon",IF(DATEDIF(Today(),[Column_Name],"d")<=335,"Up to Date","Error"))))
Here is my test result (the value of "Today" is 6/22/2023):
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