Accidentally entered "No" for form 4562, question 24a. ("Do you have evidence to support the business/investment use claimed?") How do I change it to "Yes"?

When TurboTax asked in passing, I accidentally entered "No" for form 4562, question 24a. ("Do you have evidence to support the business/investment use claimed?") Now I can't figure out how to change it back to "Yes". I've gone as far as deleting and recreating the entire asset deprecation section, to no avail. How do I change this option to "Yes"?