I have just taking over Bookkeeping for this company they have 2 accounts. I have created clearing accounts in both. 

now company A pays for invoice for Company B, but Company B was invoiced for work Company A did.

in accounts it shows all invoices have been paid, but nothing has been reconciled between these 2 accounts since Company A year end in Aug 2020. NOw Company B's Year end is coming up at end of May 2021. 

what would be easiest way to reconcile accounts so it is reconciled, have about  200 invoices to date. thank you