unable to change to certain check in dates
Just joined and want to change my house that they can only check in certain time period. I already read the page https://partner.booking.com/en-gb/help/reservations/can-i-close-certain-dates-avoid-bookings-days-i-can%E2%80%99t-check-guests
But I cannot find or see the button: no arrival anywhere.
Where can I find this button?