How do I enter assigned STCG on a 1041 for a trust using TurboTax Business?

I'm filing a return for a trust using TurboTax for business and I don't see how to enter short term capital gains that are assigned by a mutual fund. Ordinary short term capital gains are clear, but they require me to enter basis and a cost, which are not available with an assigned capital gain. Where can I enter this information?