An IRS income tax return may be made your tax attorney if the taxpayer is unable to make it by reason of illness or continuous absence from the United States for a period of at least 60 days before the due date, or if the taxpayer requests written permission from the IRS and the IRS finds good cause to allow such substitution.
A return that is signed by the IRS tax attorney on behalf of the taxpayer, but without the taxpayer having first executed a valid IRS power of attorney, is not a valid tax return from the IRS’ perspective.
Tax Liability for income, estate, and gift taxes generally is reflected on required tax returns. To the extent that these tax returns disclose that IRS tax debt exists, the IRS may summarily assess those tax amounts even if you or your tax attorney did not execute the return.
Keep in mind that, any person liable for any Internal Revenue tax or for its collection must make a reutrn or statement of tax liability.