Taxpayer, 50 y.o, was a 33.33% beneficiary of an 80 y.o. decedent's IRA.  New York excludes up to $20K of retirement distributions and in this case, the taxpayer was one of 3 beneficiaries and therefore is eligible to exclude 33.33% of $20K.  I can get Lacerte to apply the 20K exclusion by checking these boxes on screen 13.1, but how do I get it to apply the 33.33% allocation?