What you can do is just reduce the asset cost basis (property only, not the land) by the amount of depreciation already taken on the SCH E of the last personal return you reported this property on. Besides, on that last return you had to show the transfer of the property from you personally, to the partnership by indicating you removed it from business use for personal use, the day before the partnership start date.
Then the in service date will be the partnership start date. This starts depreciation over at year 1 for 27.5 years. I don't see this as a problem provided you, and only you, legally owned the property prior to forming the partnership. This is because you, and only you, were allowed the depreciation (and did take it) prior to the partnership.
If you over ride things, then you are telling the program that "ALL" partners benefited from the depreciation taken prior to starting the partnership - and that's just not true.
