Amy's answer is very helpful. The California TT form (easy steps) is confusing by using the word "Elect". By Amy's explaiation, there should be no electing to this, it is simply the amount if the investment income (provided, and brought over from the Federal forms) that applies to California. The California form says "Net Capital Gain to Include in Investment Income". While accurate, it does not convey the real intent that it is trying to distinguish what portion is taxable by California, and the "Learn More" help information does not clarify this at all.
It is clear that "Elect" is the word chosen on the easy steps because that is the word used on the California form 3526, but additional information to make clear is not given.
Also, the Cal form provides a blank field to enter the amount, but it is ambiguous as to whether leaving the field blank would simply mean the whole amount will be transferred automatically.
