canbe,
WELCOME TO THE AWS WELDING FORUM!!
Google search for 'API 1104 errata' and you will find several sources.
You can go through API, AWS Bookstore, and others. If going to a seminar for CWI using API 1104 you will get the errata I believe at the seminar. As well as the workbook/code clinic for API 1104. But you must have your own codebook; either the 20th or 21st edition. Seminar is around the 20th but you can use the 21st for the exam, that's a better bet. Get the newest and don't mess with the older one.
He Is In Control, Have a Great Day, Brent