I found a solution for this!  After several calls to Intuit, a helpful gentleman with ProSeries called me and gave me the solution.  On the "Prep for Taxes" screen in QBO, once you have all the accounts mapped, then you need to toggle back and forth between cash and accrual basis (hitting save each time).  This forces the software to recalculate the numbers.  Then go back to ProSeries and try the import again.  It should work and no more error message.