I don't find a reference to a beneficiary worksheet in the program. It may appear on a schedule or form, can you tell us what schedule or form you are seeing the error message on? The beneficiary's share of trust income and expenses is reported on the schedule K-1. Entries to that schedule come from a worksheet called Amounts to Allocate to Schedules K-1 Worksheet. You can make entries directly on most of the lines in that worksheet that will populate on the schedule K-1. If you see an item that needs adjustment in the error message you are seeing, you may find that item listed on this worksheet so you may be able to correct things there. You bring up the worksheet by using the Forms icon on the top right of your screen in TurboTax.
When I run the Federal Review I got an error which sent me to the List of Beneficiaries. Text reads "Beneficiaries percentages do not equal 100%" No entries are allowed on this page. The information seems to flow from a worksheet on the K-1 pages. The program appears to require percentages even though the form itself reads "Enter dollar amount... OR enter beneficiary's percentage..." Entering both seems to satisfy the Review.