How to remove duplicates based on latest dates

gigotomo 
Here is one way to do this

1. Open Power Query Editor
2. Duplicate this table in PowerQuery
3. delete summary column from new table
4. Right click on INC_Num and select Group by
5. In Group By pop up box give New Column Name the value "Submit", set operation to "MAX", and select Submit under Column. Click OK
6. Duplicate INC_Num & Submit columns
7. Duplicate INC_num column & Submit column in current Table
8. select both "Inc_num - Copy" & "Submit - Copy", right click, and select Merge Columns. 
9. Click OK in Merge Column popup box
10. Return to the original table and repeat steps 6 - 8
11. Now you have a shared Key you can Merge Queries together. From the Original Table click on "Merge Queries" in the top Home Ribbon
12. The top query will be your Original Table and you need to select the new aggregated table as the second table. Then click on the merged column in each table as your join column. Under Join Kind select "Inner (Only matching rows)
13. That's it. This will have only grabbed the INC_Num with the last date.  

gigotomo ,

Please refer the below thread to achieve your need.

https://community.powerbi.com/t5/Desktop/Drop-duplicate-rows-retaining-latest-date/m-p/878537