QUOTE (Eric. @ Mar 20 2009, 12:09 PM)

In general - Pub 560; Compensation is the pay a participant received from from a business in which your services materially helped to produce the income. .. You can also have earned income from property your personal efforts helped create, such as from royalties from books or inventions.
Thanks much.
Now to add one more level of complexity to this issue:
Is it absolutely essential that the income be reported on Form SE as self employment income and that the self employment tax be paid in order to properly use the income as a basis for the SEP contribution? I believe the individual has claimed the royalties as supplemental income on his tax return.
If the individual has improperly made a SEP contribution, any suggestions on how to clean this up? Would it be possible to go back and amend his tax returns and complete the Form SE and, of course, pay the self-employment tax?
Thanks again for any light you can provide.