Advise for a new MIP

This is just cut and pasted from a recent email, feel free to adjust as you like:

Dear x

Please find attached your accounts and tax return for 2008-09 along with your tax computation. Could you please check through them and let me know if you have any questions or would like any explanations. Subject to that could you please sign on the following pages and return them to me:

Accounts: page 2
Tax return: Page 6

This will authorise me to submit your tax return online for you.

I enclose a tax computation which shows tax and NI liability of £x by 31st January 2010 plus a payment on account of £y in July 2010.

I will return your paperwork for the period in the post this week.

If there is anything else I can be of assistance with, please do not hesitate to get in touch.

I also attach our invoice for your kind attention in due course.

That's very similar to my letter but I also add in a line to say that the return won't be submitted until I've received full payment for my invoice, and I include...

'Assming that your circumstances remain the same, I'm providing you with a quote of £xxx to complete your 2010/11 tax return. This amout will be reduced by 10% if I receive your information by 30 June 2011. I trust that you find this satisfactory.'

Jodie