1234, Main Street
Boston, MA 02123
05 April, 2005
<Recipient Address Goes Here>
Hello,
<I/We> <was/were> filing <my/our> income tax when <I/We> had <a/some> <question/questions>:
<question(s)>
Please contact <me/us> with the <answer/answers> as soon as possible. You may call at <phone number> or write to <address>.
Thank you for your time and assistance.
Regards,
Robert Anderson
encl: <List of enclosed items goes here>