When you have prepared your amended return and are ready to mail Form 1040-X you should include the following forms:
- Form 1040-X (2 pages)
- The new (amended) Form 1040 (2 pages)
- Any forms or schedules that were added or changed as a result of preparing the amendment
The rest of the pages that printed were most likely worksheets, and should not be included with your amended return.
Do make sure that you keep a copy of everything that you send for your records. It is also a good idea to use a service that provides delivery confirmation (certified mail with return receipt, priority mail, UPS, or any other service that provides tracking).
Please note that 1040-X cannot be e-filed - you will need to mail a paper return. It takes the IRS at least 2 - 3 months (and sometime up to 6 months) to process amended returns. Also, depending on whether the changes affect your numbers, you may also be required to file an amended return with your state.