questions uc form (esa to uc)

Hello,
I'm unsure how to answer the question "Have you applied for a reduction in your Council Tax?" (Options are: Yes/No but I will apply/ No I dont want to apply). I've been getting CTR for years but I never applied for it, the council did it automatically when I applied for HB years ago. Does the form refer to CTR once i get UC? (In which case I answer "No but i will apply". )

Should I phone UC helpline and inform of complex needs as I have been feeling suicidal with this extreme terror about UC. Or wait and write in journal? Is there anywhere to write it on initial application?

Thank you.

I've just claimed UC on managed migration and answered this question "Yes" as, like yourself, I'm already in receipt of Council Tax Support. UC should notify your local council when your UC claim is paid. If you're worried about it, you could phone your local council and inform the benefits section that you've just made a claim to UC.