Thank you, @Anonymous_ and @metchy ! I was successfully able to input beneficiary percentages using the Forms method.
I'm now encountering additional bugs. The K-1's generated don't show the estate's capital gains; those fields are blank. Additionally, at one point today, the various beneficiary names/addresses/info were all replaced with identical names/addresses/info from one beneficiary! This is the buggiest I've ever seen TurboTax...
