Deductions & credits

I tried your method of using the same Financial company in the dummy DIV and that worked for me.

But I am wondering about another odd aspect.

 

I had a total of $537.93 in foreign tax paid.  I only had to enter my two largest contributors to that foreign tax paid to get a credit of $538.

When I tried to enter more than one DUMMY DIV, my TT taxes to be paid went up instead of down because the foreign tax credit went down.
Why was that?
I followed the same approach of making sure I modified 1a, 1b and 7.