Tailwheel and aeros are not ratings and therefore they are not added to the pilots licence. Tail-wheel requires only 'differences training' with an endorsement of the pilots logbook. There is no specific requirements for aerobatics and therefore no rating or endorsement is required. No licenced aerodrome required therefore for these two.
Seaplane is a rating but strangely is not required to be undertaken at a licenced facility, however, the student must already hold a PPL with a current medical to undertake training. The Seaplane rating is not required to fly an aeroplane that has
floats - you don't need a rating for floats but the Seaplane rating is required for operating on/off water. Now you might think...................!