I have a new client who asked me to get their 2019 Quickbooks  online in order.  The problem is that they have incomplete previous years (from 2012 on) and the last reconciled accounts were in 2015 and 2016.  I can't reconcile 2019 until all of the prior years are reconciled but they want to file 2019 taxes without reconciling the prior years.  Any ideas on what I should recommend to them if they don't want me to go back and enter all the transactions for prior years? Is there a way to make adjusting entries to start 2019 fresh but account for the changes in the opening balances?

Any help would be appreciated.