Who do you contact if want to use copywrited song lyrics on t-shirts?

The copyright holder of the song lyrics. This could be the songwriter, the music publisher, or the record label. You can usually find contact information for the copyright holder by doing a search online.

Once you have contacted the copyright holder, you will need to negotiate a license agreement that allows you to use the song lyrics on t-shirts. The license agreement will specify the terms and conditions of use, such as the number of t-shirts you can produce, the countries where you can sell the t-shirts, and the royalty payments you will need to make.

If you cannot reach an agreement with the copyright holder, you will not be able to use the song lyrics on t-shirts. Copyright infringement is a serious offense, and you could be subject to legal penalties if you use copyrighted material without permission.