Generally, portfolio income is not reported on Sch E. Part I is used to report income/deductions from rental real estate and Royalty income/expenses. I interpret your comment of "Other Portfolio Income" to be investment income. Not reported on Sch E.
See Instructions for Sch E
https://www.irs.gov/pub/irs-pdf/i1040se.pdf
Link here for Investment Income and Expenses (Portfolio Income)
https://www.irs.gov/pub/irs-pdf/p550.pdf
**Disclaimer: Effort has been made to offer correct information; but due to the discussion forum limitations, the poster disclaims any legal responsibility for the accuracy of the poster's response**
