Hal wrote:

Doing a electronic declaration for a 300/500k cross country flight is
it possible to have the starting point be "Release from Tow" or does
that require a written declaration.

Yes, the release point can be the start point, no written declaration is
required, as the release point will be documented by the flight recorder
(remember to notch, or make a tight 360 degree turn, and also make sure
you don't release so high as to run afoul of the loss of height rules).
Note, however, if you are attempting a triangle or out/return for
Diamond goal, your start and finish points must coincide, which can be
most easily accomplished by either releasing directly over the airport,
or electronically declaring the same waypoint as start and finish.

Marc