Every statutory due date for the next twelve months, from five answers about your business, with the section it comes from. Put it in your phone.
Five answers decide which dates apply to you. Nothing here is stored anywhere but this browser, and you can change an answer at any time — the calendar redraws itself.
Companies and LLPs get CP204 instalments and the seven-month return automatically. The annual return needs the incorporation date; leave it if you do not have it to hand.