With the TurboTax 2024 Business product, I had the same problem: "Filer's EIN and Name Control in the Return Header must match data in the e-File database."
It is interesting that the council in the same TurboTax message suggested: "... the IRS recommends you call the IRS e-File Helpdesk at (866) 255-0654 to determine what corrections need to be made to the name in the e-File extension." The first person I spoke with said the number was for professional tax preparers. I tried again hoping for a person who would be willing to help. They confirmed the information transmitted. The trust name was (changing the name, but keeping the same number of characters): "Trust FBO Karen Rockwell Silken" and the generated name control was KAR. I added an E using the instructions from @JulieS to make the name control KARE and resubmitted. The return was accepted 🙂
The helpful person, with whom I spoke, said that if one called [phone number removed], they would be authorized to tell me the four name control. I would have tried that had my guess not worked. That number advertised a 55 minute wait, as opposed the 4 to 7 minute wait for the number that I called.
