Is there anyway to make corrections after the month has been reconciled?
Correcting - or editing - anything in a bank transaction that affects neither the net amount or the bank account to or from it was posted will have ZERO effect on a completed reconciliation of that bank account. A reconciliation is only concerned with the single account being reconciled.
The outlier would be affected loan payments and only if you had reconciled those loan accounts
Oh and if a company (intuit) rep comes on here saying you have undo or reverse the reconciliation in order to change expense accounts a cheque was posted to - they would be full of carp!
I don't think it is quite right to call a robot a rep
And the problem, as we see with this question that keeps on coming up, is that QBO stupidly warns you when you change anything on a reconciled transaction, even if it's just a note or even the distribution account; these things have no bearing on the bank rec, but scare people