Create the period under Payroll > New period: month, year, type (monthly, 13th salary or advance) and payment date. It starts open with all active employees.
Creating the period
Under the Payroll menu, click "New period". Choose the month and year, the period type and, optionally, the expected payment date. There are three types: the monthly payroll (regular), the 13th-salary payroll and the advance, where you set the percentage of the salary paid before month end.
The period starts with the "open" status. This is where you enter the month's overtime, premiums, commissions and deductions before calculating; nothing is charged to the employee until the payroll is approved.
Who is included
Every employee with the "active" status is included automatically. Employees on leave, inactive or terminated before the period starts are left out, and anyone hired mid-month comes in with a salary proportional to the days worked.
Each employee gets an individual payroll inside the period, with its own calculation, and that individual payroll is what becomes the payslip.
The period lifecycle
The status moves from open to processing (after "Calculate"), approved and paid. Approval releases the payslips; "Mark as paid" closes the period and cannot be undone. A period opened by mistake can be cancelled, and the audit trail records who took each step.