I can hardly see anything in that screenshot. A list of fields (preferably with their MP3tag names) would be much nicer.
I do not doubt that you tried but for further support it would be very helpful if you told us what you tried esp. in repect to the export script showing the code, the steps you took to create the CSV file, the settings that you used in excel to import the data.
Also, a search in the forum might give an answer straight away:
and also here:
And finally, what is the purpose of all this?
I do not really see a lot of functions where Excel is better than MP3tag to manipulate tag data, on the contrary, I think there are a lot of functions in MP3tag that excel cannot offer.
I would assume that some time later you want to import the data again, so please make sure that you know the intricacies and what to look out for when importing data from text files: