Income allocable to Illinois

Regarding Turbotax business and Form 1065 and IL-1065.  Our multimember LLC has two members, one resided in IL all year, one moved from IL to TX during the year.   All income from the LLC was generated outside IL.   My understanding is that all income is allocable to IL for the IL residing member, but is split for the  member that moved.  How do change the allocation of income  using Turbotax for Business?