To ensure that Tanda costs your salaried staff correctly on their timesheet and in reports, you’ll just need to configure how many hours they are contracted to work in a pay period.
If all salaried staff are expected to work the same amount of hours, you can configure this in Settings > General Settings > Salaries.
Alternatively, if salaried employees vary expected hours, you can set this on an individual basis by enabling advanced payroll and then heading to Staff >My Team > Employee > Payroll. Expected hours enter on a staff profile will override the number enter in Settings.