Maybe I'm just daft, but this tool is a bit confusing at first because I didn't realize it wasn't comparing the difference between itemizing now and taking the

Maybe I'm just daft, but this tool is a bit confusing at first because I didn't realize it wasn't comparing the difference between itemizing now and taking the standard deduction under the new plan (and there isn't a way to do that without manually crunching the numbers). Or better said, it doesn't pick your best deduction under each plan like you would if you were actually filing taxes.