Oh sorry I didn't mean that line 18 should be zero. The tax amount on line 18 could only be reduced to zero by subtracting line 19. Then line 22 would have the zero on it. But it doesn't work that way this year. Instead of your Child Tax Credit being used to reduce line 18 you get it it on line 28 now. Which can use more than just the 8437.
Say your Child Credit is 9,000. You only could use up 8437 to reduce line 18 to zero. You would lose the remaining 563. But on line 28 you get to subtract the full 9,000. So again...What's on line 28?
