Complete your protest and mail it to the IRS address on the letter that explains your appeal rights. The IRS Independent Office of Appeals is here to resolve disputes, without litigation, in a way that is fair and impartial to the government and to you.This form is to be used to request an Appeals review upon completion of an examination (audit) if you do not agree with our proposed changes from the audit. How to fill out the IRS Form 12203 Request for Appeals Review Instructions? We have provided sample letters that you can use to request waivers of several different types of IRS penalties. Gov, or fax it to (602) 771-9913. Use Form 12203, Request for Appeals Review, or the form referenced in the letter to file your appeal, or prepare a brief written statement. Most cases filed in the Tax Court are property tax appeals, this guide focuses on property tax cases and serves only as a general guide. Any tax appeal may be filed in the Arizona Tax Department. Fill in your actual or estimated adjusted gross income for the year you wrote in the "tax year" box.