Tax returns online and CGT

Hi all, my partner and myself have filled in online tax returns for a few years as we rent property, we sold our main residence earlier this year and we are trying to fill in the CGT part of our return. Now it says "Write that Private Lettings Relief is claimed" but it doesn't ask for your working out, i.e how long you lived there and how long it was let? Am I missing something?

Thanks for any assistance.