You need to contact the IRS as soon as you can and provide them with the proper documentation. The IRS will retract their position if you show sufficient evidence that they are incorrect. You don't necessarily need a local CPA to help you communicate with the IRS, but it certainly helps. If you do get a local CPA, fill out a Form 2848 (Power of Attorney) giving them the ability to speak on your behalf in front of the IRS. The key is to communicate with the IRS as soon as possible and be ready to give them your documentation showing your position. You can reach the IRS at 1-800-829-1040.
