That seems to work. I entered a space. That ALSO caused an entry of "0." to be entered in the tax summary, "Amount applied to next year's estimated tax" field.
It isn't intuitive that a space can be entered to override a numeric field. I would think that indicating zero (e.g. none of) the refund should be applied to next years taxes would make sense / work.
Anyway, thanks for the feedback. I can finish my taxes now.
