I have a client that uses retention on jobs they do. So they hold back 3% for a year from sub contractors and their clients hold 3% for a year but invoices are raised now with a due date of 365 days. They don't want me to post the invoices until they are due but I think they should be posted when they are raised for VAT purposes. They have just had to move to accrual VAT from cash due to turnover so they are concerned about managing cash flow. Any thoughts?