As of 13 August 2026, AI can only partly create a VAT invoice.

What to actually do

1. Hand it to a person

   The route this page recommends

   A person who owns the outcome does this end to end, worth it when the failure is dear.

2. Use a tool built for this

   Second choice

3. Do it yourself

   The distant third

   A chat interface, chat-fluent skill, and roughly 30 minutes until you can act on the result.

   How to actually do it

   1. Open the current GOV.UK guidance on VAT invoices and keep it beside the chat.
   2. Gather your legal business name, address, VAT registration number, invoice number, invoice date, supply date, customer details, item descriptions, quantities, prices, currency and payment terms.
   3. Paste the prompt and replace every bracketed slot with your records, leaving uncertain VAT treatment marked as uncertain rather than guessing.
   4. Ask the model to produce the invoice and a separate list of missing or uncertain details, then check that every number matches your price list, order and delivery records.
   5. Compare the required invoice details and any flagged VAT treatment with the current GOV.UK guidance, and ask your accountant about any treatment you cannot resolve.
   6. Copy the checked invoice into your invoicing system or document template, add only confirmed payment details, save the final version with its invoice number, and send it to the customer.

   Prompt

   Create a UK VAT invoice from the information below. Use only the facts supplied and do not invent missing details. First list any missing information that could affect whether the invoice is valid or the VAT calculation, especially the supplier's VAT registration number, customer details, invoice date, unique invoice number, supply date, description of each item, quantity, net price, VAT rate, VAT amount and total. Then produce a clean invoice in plain text with separate net, VAT and total amounts for each line and for the invoice overall. Check the arithmetic twice. Do not decide a complex or uncertain VAT treatment silently. Flag any item where the VAT rate, place of supply, reverse charge treatment, zero-rating or exemption is uncertain and leave it for confirmation against current GOV.UK guidance or an accountant. Do not include invented payment terms or bank details.
   
   Supplier: [legal name, address, VAT registration number]
   Customer: [legal name and address]
   Invoice number: [unique number]
   Invoice date: [date]
   Supply date or dates: [date or dates]
   Currency: [currency]
   Items and prices: [description, quantity, unit price and any known VAT rate for each item]
   Payment terms: [terms, or leave blank]
   Purchase order or reference: [reference, if applicable]
   Any known special VAT treatment: [details, or 'none known']

   Open it prefilled in ChatGPT or Claude, or copy it into Gemini, which takes no prefill link.