Correct Vacation accruals Quickbooks Desktop Version

Hoping for some help / guidance

I set up a new payroll item earlier this year in order to track sick pay and didn't realize that I hadn't set it up to also accrue vacation (We live in Quebec and vacation is payable on sick pay).  This realization led to my next discovery that we haven't been accruing vacation on vacation paid (also due to being in Quebec).  I have a call out to our accountant but it could be a while before he answers regarding how far back I should be going in order to adjust for these internal mistakes.   In the interim, he knows nothing about Quickbooks Desktop and so I am here asking for help.  I have read through a few other discussions here and the best I have come up with is simply adjusting the amount in each employee's vacation bank.  Seeing as I am not an accountant, I feel very hesitant to simply adjust without any type of journal entry .. please advise !