No, you don't have to include the original return.
According to the IRS:
"When filing an amended or corrected return:
-
Include copies of any forms and/or schedules that you're changing or didn't include with your original return. To avoid delays, file Form 1040X only after you've filed your original return. Generally, for a credit or refund, you must file Form 1040X within 3 years after the date you timely filed your original return or within 2 years after the date you paid the tax, whichever is later.
- Allow the IRS up to 16 weeks to process the amended return."
