Please excuse me, I have a bad memory and have forgotten the screen area names. In the file editor on the left, the Year box has 1999\1999. In the main screen it has 1999. I look at the main screen and think all is well until i click on a file and see the Year isn't right. I think both Year fields should display the same information. I have missed this many times by not clicking on a file and looking in the editor box. I tried to do a screen shot, the best I could do it a Gif. It is basically a screen shot as it doesn't move.
You have 2 fields with the name YEAR which the tag panel indicates by a double back slash. This is the way Mp3tag shows double-value-fields. To achieve the same view in column view you have to define that field with the value $meta_sep(year,\\). This value by the way is the default value that comes for this column after an installation of Mp3tag. So you must have changed it yourself to something else.
You can see your multi-value-field as 2 fields if you call the extended tag view in Mp3tag (ALT-T).
The documentation can help you with the different screen area names like
- Tag Panel (left)
- File List (right)
- Filter and Status Bar (bottom)
and more: Main Window – Mp3tag Documentation
Thank you for your quick response. I don't remember changing the Year field, but did change it back with your assistance.
I haven't used MP3Tag in a few years. It is amazing how quickly we forget as we get older. I had a DJ business for years and have amassed a large amount of songs. I am trying to tag them all correctly, mainly as a way to stay busy. I am disabled with PTSD and depression and need something to keep me busy.
BTW, if both values of the year-field are the same and if you want to get rid of one you can achieve it for all with an action of the type "Remove duplicate fields"
Field: YEAR
Check "Only duplicate field for the same content"
There may be different causes for the existence of the doubled year in your tags, one of them is the possible use of Mediamonkey. This behaviour of Mediamonkey can be avoided:
https://community.mp3tag.de/t/double-records-in-year-ex-2012-2012/49830/2
I have read a lot of posts here about making (Actions) to fix a tag field. One I am using now is: $left(%YEAR%,4) to remove all data to the right of the first 4 numbers in the year.
I have learned a lot from the members here, and appreciate all of it. My biggest problem, is my mind doesn't retain information like it used to. That is why I appreciate help from members like you.
Just for the record:
If you keep only the first/left 4 characters from YEAR, then you will keep for example 2024 from
2024\\1991
because there is no check if both numbers are the same.
You would have to filter your files first to be sure that you use the above command only on YEAR content with doubled (identical) numbers.
Therefore the action "Remove duplicate fields" works better, because you have a parameter for only treating those files where both year values are the same.
https://community.mp3tag.de/t/year-in-editing-box-and-main-field-are-different/65684/5?u=poster
That might work better, and you are right, I could be deleting another year. That would be important if the original was released in 1970 and the songs were remastered in 2000. You would have 1970\2000 or 2000\1970. What I don't really care about is 2000\2000.07.06 or whatever comes after the year. Since I'm probably never going to DJ anymore, the original year isn't that important either. I guess I should be happy the year is in there no matter what the numbers are. Decrease the "Year" column so I see the first four numbers and be happy. 
Again, thank you for your time and knowledge.