excess real estate taxes for a home business

I have a home business. I put in my taxes and I am taking the standard deduction. My taxes for my home is over the $10,000 amount. Is the remaining amount the excess real estate taxes? For example, let's say my real estate taxes are $15,000. Would the $5,000 be the excess real estate taxes I should put down under Business Income and Expenses for my home office when it asks if I have any? This seems logical but it says it is less common, which makes me question to put it in.