I want to down grade my plan from QB Plus to Sole trader It says that if i downgrade I will loose my 'data'. What does this really mean?

Great question. This means that data associated with those QB Plus-only features (e.g., projects, inventory, and budgets) will not be accessible after downgrading.

Before proceeding with the downgrade, QuickBooks recommends saving a copy of your data beforehand to keep your records safe. You can use this link to request your data.

Keep us posted if you need anything else.