Are you sure that is what Lacerte instructs you to do?

I don't use Lacerte, but in ProSeries we still enter the actual 1095-A but then when we fill out the allocation section it automatically applies the percentage to the form.  With that being said, ProSeries doesn't handle the all zeros correctly either (at least it didn't last year).

Have you tried entering $0.01 for each field?  That could be a work-around.