From the information you provided, the income from the royalties received on the sales of your book should be reported on Schedule E, so you would choose the first option "Royalty investment income from a natural resource, intellectual property or other investment portfolio." Depending on which option you choose, the income will be reported on a different schedule on your tax return. The first option, "natural resource or intellectual property" will flow to Schedule E, while the second option, "being self-employed as a writer, inventor, artist" will flow to Schedule C.
- Schedule E is used to report passive royalties. Since you are not a writer and it does not seem that you are actively pursuing income from the book, this meets the definition of a passive activity.
- Schedule C is used for a business you operated with the primary purpose of profit, and that you are engaged in regularly.
Here are the instructions for reporting How do I enter a 1099-MISC for royalty income?