i have just started using mp3tag and am having problems now saving tags when i save them it says they are saved but when i play my music in windows only a few have changed
Try to stick with one tag type per file type, i.e. for MP3 you could get rid of APE and ID3v1 tags and stick with ID3v2.3 only. That is recommended practise and helps avoiding confusion.
(See Tools/Options…/Tags/Mpeg and so forth.)
Hint: When asking for help/support, it helps very much to more precisely specify your setup (i.e. What Windows version? Which music player? What type(s) of audio files? …)