How do I file a return for the trust for someone who died in 2017? I have Home and Business version of TurboTax. How can I find out how much tax the trust has to pay?

To file a trust return you will need to use Turbo Tax small business which as the estate return option: https://turbotax.intuit.com/small-business-taxes/. Turbo Tax will walk you through what you need and how to file the return and if taxes are due it will calculate those for you.