<Mention Recipient’s Address Here>
Dear <Recipient’s Name>,
<I/We> would like to file <my/our> income tax by phone this year. However, having never used this filing method before, <I/We> have some questions.
What number do <I/We> call? Are there specific calling hours? Is there any charge? Do <I/We> need any additional material besides the tax return form? <question(s)>
Please contact <me/us> with the appropriate information as soon as possible. You may call at <phone number> or write to <address>.
Thank you very for your time. Would be looking forward to your response at the earliest.
Encl: <List of enclosed items goes here>