Hi cathy,
In QuickBooks Online Payroll, maximum hours allowed is the total hours that the employee can get.
An employee's vacation time balance will automatically carry over into a new calendar year. For example, an employee received 80 vacation hours per year, with a maximum of 320 hours. The employee's vacation balance will continue to accrue until 320 available hours is reached, even if the period extends over several years.
To learn more about setting up vacation pay policy, please check out this article:
Please let me know if you have more payroll questions, cathy. I'd be glad to help.