After "Calculate", check earnings, deductions and net per employee and approve the individual payroll or the whole period; approval releases the payslips.
Calculate and review
With the month's entries done, click "Calculate". The period moves to "processing" and each individual payroll shows earnings, deductions, employer charges and net pay. Open the payrolls with unusual figures (net far from last month, an unexpected tax deduction) and check the entries.
You can recalculate as many times as you like while the period is not approved: fix an entry, click "Calculate" again.
Approval
Approval can be per individual payroll or for the whole period. Whoever approves needs payroll write permission (the Accountant or Administrator role), and the audit trail keeps who approved and when. From then on the payslips are available as PDF and for email delivery.
Mark as paid
After making the payments through your bank, mark the period as paid. This step is final: a paid period does not go back to "open" and is not recalculated even when a table changes. Avos calculates and documents payroll; moving the money remains your bank's job.