Parlami dei tuoi piani futuri quando l’incontro terminerà.

Parlami is the 2nd-person singular informal imperative of parlare plus the direct object pronoun mi (to me). It literally means “talk to me” or “tell me.”

Formation:

• Imperative of parlare for tu is parla
• Add pronoun mi after it → parla + mi = parlami

dei is a contraction of di + i, meaning “some.”

• dei tuoi piani futuri = “some of your future plans” (indefinite)
• i tuoi piani futuri = “your future plans” (definite, specific)

Using dei makes the request more open-ended.

Because it modifies piani, which is plural. In Italian, adjectives agree in number and gender with the nouns they describe.

• piani (masculine plural) → futuri (masculine plural adjective)

In English we often say “when the meeting ends” (present), but in Italian it’s common to use the future in both clauses when talking about future events.

• Main clause: Parlami… quando l’incontro terminerà.
• Subordinate: terminerà emphasizes that the ending will happen in the future.

Yes. Quando l’incontro è finito uses the passato prossimo (“is finished”). It’s grammatically correct, but:

• quando terminerà (future) sounds more formal and precise about timing.
• quando è finito is more colloquial and neutral.

Both verbs mean “to end/finish.”

• terminare often feels a bit more formal or literary.
• finire is more colloquial and very common in speech.
  You can say quando l’incontro finirà or quando l’incontro terminerà with virtually the same meaning.

Yes. You could say:
Parlami dei tuoi piani futuri al termine dell’incontro.

• al termine di = “at the end of” or “upon the completion of.”
  It’s slightly more formal/written style.