2019 amended return says they must be printed and mailed. IRS indicates 2019 can be filed electronically. How can I do this?

Mailed a 1040X in July. IRS says they are not processing mailed amended returns. IRS says 2019 1040X can be filed electronically using appropriate tax software. TurboTax only shows instructions for 2020 1040X. We are getting hammered by IRS. Amendment is a major swing from taxes owed to refund. This is desperate.