How can I get notified when there's a comment on my answer?

Right now, there is no way to be notified of that. You have to go and check each question you answer individually if you want to see. Hopefully this feature will be coming in the future. You can add a suggestion or look at other suggestions for Y!A on the Uservoice forum here: https://yahoo.uservoice.com/forums/211240

There is no mechanism to notify if you get a comment. Notifications can be set as follows:

When anybody

Answers your question

Follows your question

Rates your answer

Wins best answer

When a question you follow

Has a new answer

Has a best answer chosen

You can't as there isn't an option for that

You can't that notification is not available you have to return to the question to see any comments.

You don't,yahoo hasn't implemented that feature.

there aren't notifications for comments

You can't, not a feture on YA for now.

There is no way because the people who did the last update for yahoo are dumbos. send strongly worded email to yahoo.