What year? I don't think the 2023 Amended returns are yet. I believe it says 2/15. And you may have to mail prior year returns. And you can't amend 2023 until the IRS or state has processed the original return and you got the first refund or paid the tax due.
If you switch to efile from mail it won't mess up your return or account. It says ready to mail because the forms aren't ready yet to efile.
