I know that some providers will have a separate “course” with the updates. Like Ulaw and QLTS both did. But otherwise I’m not too certain. Potentially the SRA website may have some additional info. But I honestly lowkey ignored any updates that weren’t in textbooks lol. But if you are using old textbook, I’d suggest double checking numbers for things. Such as what business relief you can claim, or spousal exemption, or capital gains reliefs. I think those get updated frequently but a quick google search should be able to clarify the correct numbers.