IF Replace Date formula - HELP!

[MaryCann]

Hi all...  Okay, so, I have, let's say a Client ID column, a Treatment Plan Date column and a Treatment Plan Final Approval Date column.  I'm trying to write a formula where if the first Treatment Plan Final Approval Date is < = 1 compared to the next Treatment Plan Date then to replace the first Treatment Plan Final Approval Date with the second Treatment Plan Final Approval Date.  Here's where I am thus far:

[nagakavyasri · Accepted solution]

Check if this meets your requirement:

[MaryCann]

It looks like, with a little tweaking, I can get this to work!  Thank you!