Rather than a general forum you might try specialists. Here's one that might help:
If you do contact them, try to be a bit more specific than "a couple of errors" and "corrected them". What errors and how did you correct them.
Get a (clear) photo of the disputed report if you've not already done so. If you can, get the original printout too.
You should have flagged the mistakes as and when they happened and given the boss a chance to see what was going on.