Can QBO pre-fill repeated items on invoices tailored to individual customers? E.g. VAT cat, Message on invoice?

Hello THOM-SNR, you can use the automated pre-fill( cog>account and settings>advanced>automation>pre-fill informs with previously entered content) which will when you select the customer in payee auto fill in the same details as the last invoice you created and you can then amend what you need to.