Answer:
When will you go home? = Simple future tense.
When did you go home? = Simple past tense.
Step-by-step explanation:
In the given sentence, the words in parenthesis "you/go" can be used in two ways, depending on what the sentence is supposed to be used.
One way is to use "will you go" which makes the whole sentence/ question be put in the future tense.
The other form is using the past tense, which will make the sentence "when did you go home?"
So, if we write it as "When will you go home?" then it becomes a simple future tense.
And, if we write it as "when did you go home?", then it becomes simple past tense.