IF DAX code help

Hi JamesMurg 

You haven't defined the correct structure for the formula. First of all, IF takes 3 parameters  (condition, what you will do if condition is met, otherwise).
On the other hand, if you want to check if Destination ID is IOMA, IOMRT, UK653 or IOM you cannot use "AND", you should use "OR". Also, the formula cannot take more than two parameters, so you will need to use "||" operator.

Therefore you should have something like:

Column 2 =
IF('Report 1'[Destination ID]="IOMA" ||'Report 1'[Destination ID]="IOMRT"|| 'Report 1'[Destination ID]="UK653"|| 'Report 1'[Destination ID]="IOM",
"Isle of Man",
<value in other case>)