I'm French Canadian and I have a question
Wich sentense would be the correct...
I am going to see a movie when I have finished my homework.
I am going to see a movie when I finish my homework.
It should be noted that if the verb in the main clause of a sentence is in a future tense, the verb of any subordinate clause which refers to the future is usually in a present tense.
They're both correct. They are both present tenses- the present simple and the present perfect. The use of the present perfect puts a little more emphasis on the completion of the homework.