Do you know that Letter 6173 makes such a request? I would guess that it's more likely it requires you to either simply acknowledge receiving the letter or to a

Do you know that Letter 6173 makes such a request? I would guess that it's more likely it requires you to either simply acknowledge receiving the letter or to agree to something like the statement that you already had to sign to when submitting your taxes: > Under penalties of perjury, I declare that I have examined this return and accompanying schedules and statements, and to the best of my knowledge and belief, they are true, correct, and accurately list all amounts and sources of income I received during the tax year. Though of course you are right that anyone should consult a professional in such a case.