I entered an error in 2020 (covid year) on my 8606. I filed an amended 8606 (stand alone form, per the form on the bottom, was the only form required to update and be mailed in). IRS is asking for a 1040x. (no changes to the original return). When I mail in the 1040X, what all additional forms should be included with the 1040x? I have about 45 pages with all the schedules
