Don't do it...that is knowingly filing a false tax return.

The amendment process is messy...cannot be done before you either pay what you owe on the first one, or get the refund on your first tax filing (thus, probably not until the end of February)...must be mailed in...and can take months to process.

DO NOT do it !..wait for ALL you tax documents and only file when you have everything together to file at the same time.  Amended tax returns are only for unplanned mistakes.