I did some research and discovered that while distributions are required to be proportionate, they don't have to all be made at the same time.  In our case a member who was leaving the business took money out of the business (in excess of his salary) before year-end.  The other members took their share in 2019 (when cash was available).  This is perfectly legitimate.  So my question stands:  is there a separate place to enter non-pro rata distributions (cash only) and that carries to each member's K-1?  Or, do I need to override the distributions on each K-1 separately?