You will need the software that supports ID3 tags exporting/saving option during wma to mp3 conversion procedure. If your WMA to MP3 export software do not create ID3 mp3 tags, you will be able to edit them using our software.

Other Topics
What is the best free software for DVD Home Theatres supporting mp3 playback?
How many digits in the filename after copy/rename mode of Mp3 ID3v1v2 Tag Edit & Sort Tool?
What is normalization of mp3 file?
How much does it cost your software?