Received misc. income 1099 for my deceased husbands writings, under royalties. How do i not pay self employment taxes?

The royalty income will be reported on Schedule E instead of Schedule C since it is simply a royalty and not income for an active business.  Reporting the income on Schedule E will not involve any self-employment tax.

Take a look at the following TurboTax article for information and instructions to enter your royalty income:

How do I enter a 1099-MISC for royalty income?