In bookkeeping, you generally have the same amount on both the debit and the credit side. So my best guess would be that this amount is set off against the same amount on the other side of the ledger.
While "sich verrechnen" does indeed mean to miscalculate, it is extremely unlikely that you'll find that particular meaning in a balance sheet or an accounting statement.

Here are all the possible translations for verrechnen:
verrechnen
(com) to net (with)
– to set off (against)
– to offset (against)
(ReW) to absorb (ie, spread through allocation)
(ReW) to charge (eg, as an expense)
(KoR) to allocate
– to apportion
– to assign
– to charge
– to distribute
– to identify
– to spread
– to trace (to)
(syn, verteilen, umlegen, zurechnen)
(Fin) to clear
– to settle
[Schäfer]