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Anonymous Sorry, having trouble following, can you post sample data as text and expected output?
Not really enough information to go on, please first check if your issue is a common issue listed here: https://community.powerbi.com/t5/Community-Blog/Before-You-Post-Read-This/ba-p/1116882

Also, please see this post regarding How to Get Your Question Answered Quickly: https://community.powerbi.com/t5/Community-Blog/How-to-Get-Your-Question-Answered-Quickly/ba-p/38490

The most important parts are:
1. Sample data as text, use the table tool in the editing bar
2. Expected output from sample data
3. Explanation in words of how to get from 1. to 2.

HI Anonymous,

I think you can add a calculated column to calculate the datediff based on 'start date' and 'end date' and nested with if statement to compare with datediff to return tags. (if the 'end date' equal to blank, you can use today function instead)

BTW, since we do not clarify your data structure, can you please share dummy data to test?

Regards,
Xiaoxin Sheng