Thanks a lot! That cleared up many things. I had to make one other slight modification...in the while loop, I cannot use LAST, rather I want to use NEXT at the end also because I want to continue to check until the end of the file rather than break the loop as soon as the last requirement is met.

while ($line = <ORIGACCTLIST>){
chomp $line;
($filename, $state, $amt, $ttl, $account, $name, $invnum) = split /\t/
+, $line;
$name =~ s/\s+$//g;
next if exists $exclusionlist{$account};
print $output "$filename\t$state\t$amt\t$ttl\t$account\t$name\t$invnum
+\n";


if (exists $ncacctlist{$account}) {
        print $ncoutput "$filename\n";
        next;
    }

if (exists $ccacctlist{$account}) {
        print $ccoutput "$filename\n";
        next;
    }

if (exists $ccnamelist{$name}) {
        print $ccoutput "$filename\n";
        next;
    }
        print $ncoutput "$filename\n";
        next;
}
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