dmertz, how would this answer change if the $18,000 elective deferral were to the Roth side of the Solo 401K plan? Should we be completing Form 1125-E even if a company has receipts less than $500,000? The IRS 2017 form states it should only be filed to report detail of officer compensation for businesses with $500K or more receipts. Thanks for any clarification you can provide. These elective Roth contributions are not as common so I am hoping you can enlighten me.
