Electronic declaration

2 questions folks.

1 - How does one declared a free distance task electronically?
Declare takeoff and (possible) landing points only?

2 - If a declaration of any task is made electronically and the logger is
sealed in the glider does the declaration still need to be refreshed every
day to include the date of the flight or will one declaration cover several
days of flying?

I'm thinking of a situation where you are away from OO's for a period.

TIA
Ian