Welcome to the Forum rogers1944 !
First, Target is input to the Sub and you are wiping it out. It tells you what cells changed. You need to test to see if D85 is the cell that changed.
Second Target is a Range, and Range has no method or property called Const.
Third, your code seems to be looking to see if the cell has nothing but a carriage return. Do you really want to see if the cell contains some text that includes a carriage return?
And last, you probably want to also look for a line feed, which is what you get if you type ALT+ENTER into a cell.
Please try this and see if it does what you want.
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