Singapore Airlines cancelled my flight - are my points automatically refunded?

Singapore Airlines have just cancelled a trip I was making in April. Will they automatically re-credit my Krisflyer account with the points and refund the taxes I paid, or are there forms that need to be completed for this to occur?

I believe you have to call up to request the refund or organise a rebooking. Taxes and points should be refunded if you choose to receive a refund.

Thanks for the clarification djtech.