The CYA adjustment forumula is included in the back inside page of the booklet that came with your Taylor kit. To simplyfy it just subtract 1/3 of your CYA reading from your TA reading if your pH is between 7.4 to 8.2 and subtract 1/4 of your CYA reading from the TA reading if your pH is 7.0 to 7.2. The result with give you your adjusted TA. It will be close enough!