Considering the situation described above, Kaelyn's child and dependent care credit in 2021 if her AGI for the year was $130,000 is "$16,000."
This is because according to the American Rescue Plan Act of 2021, individuals can claim the child and dependent care credit of $16,000 of expenses for two or more qualifying people.
Given that the qualifying people here are four-year-old twins, this makes it two or more qualifying people.
Though Kaelyn's Adjusted Gross Income (AGI) is $130,000, the rule of using 50% - 20% of expenses to claim the child and dependent care credit will come into play if the eventual credit will be more than $16,000.
Hence, in this case, it is concluded that the correct answer is $16,000.
Learn more about the child and dependent care credit here: https://brainly.com/question/14441741