Thanks for your response. 

See Utah code section 59-7-306:Rends and royalties from real or tangible personal property...shall be allocated as provided in Sections 59-7-307 through 59-7-310.

59-7-307 reads: (1) to the extent that the following constitute non-business income:

(a) net rents and royalties from real property located in this state are allocable to this state;....

The issue I was having and tech support couldn't resolve, was that initially, Lacerte wanted to apportion the Utah rental income between UT and CO.  We figured out how to eliminate that.  I did follow the same procedure that you had indicated re: Schedule H.  However, Lacerte could not allocate the UT net rental income to the individual partners on the UT K-1.  It's apparently  bug in their program and tech support indicated that if you have a sched. H, you have to file a paper return anyway????  So we're going to file a paper return for UT and type in the correct allocable amounts for each partner.  Thanks for taking the time to respond, particularly at this busy time of year.