I have taken on a position where there are accounts that have never been reconciled, going back a few years. For example customer deposits! Should I go back and reconcile all transactions that I can so long as I put in a current date as the reconciliation date i.e 30/12/2019? Can I just tick off and reconcile a few at a time so long as I keep reconciling to the same date? That way at least I can see what is remaining and deal with any errors in the current financial year.