What do you mean the business use varied? It was personal, 100%. Then it became business, 100%.
When the business use percentage varies each year, TurboTax cannot automatically calculate the disposition of an asset. You will need to make manual adjustments to the return.
However, if the rental property was rented 100% for the last six years (the entire time it was a rental property), then the business use percentage did not change, and you can answer no to this question.