Update an Access field when YES/NO field changes

I have an Access database 2016 and within a table in the database there is a yes/no field (checkbox), when a technitian clicks the checkbox, i want the datefield to update. I.E when he completes a task, check this box and the time is logged, it needs to be within the table, NOT a form. How do you do this with the checkboxes right in the table, NOT in a form.