Answer a few plain questions about your accounting records and see what is ready, what still needs chasing, and what a preparer will want to look at directly. Nothing here needs a tax answer first.
This is a preparation aid, not a tax computation. It does not work out what any tax comes to, it does not determine whether any return or payment is required, and it states no rate, threshold or date. This tool does not save your answers; they are used only to draw the checklist on the page.