I used Deluxe to file my 2016 return. I now need H&B in order to do a irrevocable trust return. Can I just upgrade to H&B or do I need to buy a separate copy of H&B?

A Trust tax return, Form 1041, can only be completed using the TurboTax Business Edition, not the Home and Business Edition.  The Business Edition is a separate program from the personal editions of TurboTax.  The Business Edition can only be installed on a Windows based computer, not on a Mac or online.  The Business Edition cannot complete a personal tax return, Form 1040.  Go to this website for the Business Edition - https://turbotax.intuit.com/small-business-taxes/

IRS Form 1041 U.S. Income Tax Return for Estates and Trusts - https://www.irs.gov/pub/irs-pdf/f1041.pdf

IRS Form 1041 instructions - https://www.irs.gov/pub/irs-pdf/i1041.pdf