Thanks!  I found the checkbox on screen 35.1 (at the bottom of the Gross Income Within Country section).  That adjusted line 18 (which is only allowed if I adjust lines 1a-5 on the 1116).  So, I think I've got it.  So, one is calculated by Lacerte; the other is manual.  If I adjust both, I am able to use more credit (I think it's because most of my income is taxed at the 15% cap gain/div'd rate).  Appreciate the help!