Maybe - I have noticed that you are not so happy about homework what's up ?
if the kid thinks we are actually in Plan A under the guise of Plan B - he will need reassurance - so after the ' I don't want to talk about it , go away - ' I am not interested in forcing you or making you do homework , I just want to listen to you , hear your perspective
if he still does not want to talk - we still want to find a way to get a conversation going so - it would go like this
I have noticed when I want to talk to you about homework , you seem to get upset at hearing the homework word - what's up or why do you get upset
so the conversation is not about his concerns about doing homework but his concerns about talking about homework with you
check the Plan B - cheat sheet to see that you are doing Plan b in a proactive way , not in the moment - best after you have connected and feel good about each other
keep up the conversations , perspective taking on non-emotive subjects as well