Hi there,
It's important you're able to enter accrued vacation in QuickBooks Online Advanced Payroll. I'd be glad to steer you in the right direction with this.
In order to enter the historical vacation, you'd have to reach out to our Payroll Support team using this link here. One of our agents will be happy to enter the vacation amount on your behalf. In case you have other questions, don't hesitate to comment below.
I'll be on standby.