That is not correct. My past returns say child, not son or daughter as you suggest. I previously filed my returns without TurboTax. Whether is has been that way before with TurboTax isn't really relevant. There is nothing on the tax form or instructions that says son/daughter distinction is required. But that info is very valuable when you business sells data insights.
And, there are lots of instances were those options would be incorrect. For example, if you became the legal guardian for your nephew, they might be your dependent but they are not your son.
