Why can't I choose the correct tax code I need on the sale invoices? I need to add 20.0% ECS which has been set up but it show on the drop down list.
Welcome to the Community, thank you for your question!
20% ECS is only available on purchases, i.e. bills/expenses. The only ECS codes available to use on sales are 0%. This is set up following HMRC VAT guidelines, so if you are unsure of what to use, please contact HMRC who will be able to guide you correctly.