Investors & landlords

It then asks for the actual acquisition date which was back in June 1996 when I purchased as a primary residence and then converted to full-time rental in June 2003.

This was originally blank, should I just leave it blank?

 

Also, do I need to enter Nonrecaptured section 1231 losses?  The only time I had something in Form 4797 was in 2016 but related to another business' K-1.  Not related to this rental property.