"Did I have to specify in my application that I would like to attend this course, or is that a next step if the outcome
will beis positive?"
When you have did + a main verb, the main verb is not inflected, since did is already the past tense of 'do'.
Do I have to? (present)
Did I have to? (past)
"I am looking forward to late August to come"I've already answered this elsewhere.
Student or Learner