If you are a life insurance agent then your trails or continuing commissions are considered self-employment income and do go on Schedule C.
If you are sure that yours are not subject to this tax, you will just tell TurboTax that they are due to a hobby or sporadic activity and that will move them to "other income" - but be careful with this. The IRS is expecting to see 1099-NEC income, especially income that regularly persists, on Schedule C.