I’m preparing an amended 2021 tax return using TurboTax 2021. It will not allow me to enter a current signature date and will only accept dates between 1/1/22 - 12/31/22. Would I still be able to file electronically by choosing a signature of date in 2022 or do I have to mail the 1040-X? If mailing do I also need to include a copy of the original 2021 tax return? Thanks
