It definitely continued as good friends, in her memorial speech Tasha calls Data "my friend". As far as canonical evidence towards their physical relationship continuing, I do not recall any.
As per this answer Data's last known intimacy that he talks to the Borg queen about, is likely Tasha, however the star dates given by the writers were likely mixed up (as it is a date after she died).
There is most likely, though I refuse to research it probably plenty of "fanfic" dedicated to this subject, however as far as straight from the canonical sources, I do not believe anything is said about their physical relationship continuing, in fact Tasha I believe remarks to Data that "it never happened" at the end of the episode in question. That coupled with her speaking of him as a "friend" in her memorial speech, puts him squarely in the "friend-zone" (obligatory TV-Tropes warning) I am afraid.