not every tax deduction uses cash so no.

between using borrowed funds, other tax credits, in-kind donations, carry forwards or carry backs from other tax years, you should be able to get it to zero or near zero without spending all cash/profits on hand

and then the corporation can have one financial circumstance that has nothing to do with your financial circumstance improved by payment from the corporation

theyre conduits, it depends on how much authority you have over the corporation