Here is a tutorial for the step to remove the seat on a honda rebel 250.
Here is what your seat looks like before you get started. See below.
First remove the 2 8mm screws at the rear of the passenger seat on either side of the tail light. See below.
Next slide the passenger seat away from the driver seat to release the clip holding the front edge of the passenger seat. See below
Next remove the 2 12mm bolts holding the fram of the driver seat. See below.
Now slide the driver seat away from the tank to release the clip holding the front edge of the seat. See below.
You have successfully removed your seat. Just reverse the process to remount the seats.