In general, your TDA deductions would take effect with the first payroll that occurs at least 30 days after TRS receives your elections.

For current TDA participants, any Ongoing contribution rate change would go into effect on the first payroll that occurs at least 30 days after TRS receives your request, a Future-Ongoing rate change would go into effect at a future payroll date of your choosing, and a One-Time rate change would remain in effect for a single payroll period.