June 3, 2019 10:26 AM
In your case it would be investment income since you did not create the music that generates the royalties, therefore, it is not Schedule C self-employment Income.
Please read the TurboTax FAQ for more information on "How do I enter a 1099-MISC for royalty income?": How do I enter a 1099-MISC for royalty income?
You'll be prompted to set up your royalty property in the Rents and Royalties section or the Business Income and Expenses section, depending on which classification it falls into.