Investors & landlords

I am getting the same question in my Turbotax Arizona State filing. I have a long-term capital gain of $50,000. This is all from actively managed mutual funds that I have held for years (some before 2011). All of them have their dividends reinvested. I have never sold/exchanged anything in them over the years; I have occasionally added to them. This $50,000 amount is essentially the long-term cap gains for the active fund manager making trades.

So my question is - am I supposed to go back through all the dividend reinvestments and my purchases over the years until 2011? Or do I enter the entire amount of $50,000 since this is this year's long-term cap gains from fund manager trading and dividend reinvesting?

Thanks.