Do I need to sign previous return when filing amendment?

[rosecali]

I'm filing a federal and CA state amendment. I know I need to sign the 1040X and include the old return. Do I sign the old return as well? And same with CA return?

[Bsch4477 · Accepted solution]

Include with your amended return only those forms and schedules that have changed from your prior return.  You do not have to re-send your entire prior return.  You only have to sign the amended returns.