How do I submit my MTD tax return 2025-2026 (landlord) now that I have entered my year of finances?

I have entered all my accounts into clear books (having eventually worked out that I needed to set up a landlord account and pay for it as I have multiple properties) but I can't see how to submit 2025-2026. The system seems set up ready to start quarterly updates from 1st April onwards but there is nothing I can use to update 2025-2026 which is all the figures I have put in.