How do you enter a nominee distribution for exempt-interest dividends?

I was able to do it on sch. b for interest and ordinary dividends, but exempt-interest dividends aren't supposed to be reported on sch. b, only 1040 line 2a.  If I use the same procedure for the exempt-interest dividend as for the ordinary dividend, the amount on line 2a doesn't change (i.e., no adjustment for the nominee distribution is made) and I get an error in TT b/c the amount of the adjustment is more than the amount of ordinary dividends listed on that 1099-DIV.  Do I just need to manual adjust the amount in 2a and make a statement somewhere (??) that the adjustment is for a nominee distribution?