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Annual reports:
http://tax.utah.gov/commission-office/reports
Income Tax:
http://incometax.utah.gov/
Forms and publications:
http://tax.utah.gov/forms-pubs
Old Forms and publications (2005 to present): http://tax.utah.gov/forms/index.html (includes list of recently added/changed pubs and forms from past filing periods)
Old Forms and Publications (1995-2004): http://tax.utah.gov/forms/pubs.html
Old Forms and publications (including draft versions): http://tax.utah.gov/forms/finals/release.html?#pubs
Search the Internet Archive http://archive.org for:
Revenue summary reports:
http://tax.utah.gov/esu/revenue/index.html