Currently if a pledge is marked non-deductible it puts a negative amount towards that person's journal. If they do not complete their pledge, it is still negative the total amount of the original pledge, which could negate other gifts. If we could make pledge payments non-deductible, it would allow us to have the exact amount paid in be non-deductible and allow us to export more accurate lists of deductible amounts without having to manually edit pledges!