I sold a stock last year that had dividends reinvested for several years. I have a document showing each purchase of new shares. It's a fairly long list of transactions. Do I need to report each individual transaction on the tax form as a separate line item or is there a way to aggregate them together so that only a couple entries are necessary? Perhaps one line item for short term gains and another for long term? If so what purchase dates would I use? The IRS is only interested in long vs short term, right?