Individuals can use tax software to e-file Form 1040-X to amend a 2019 1040 or 1040-SR that was filed electronically. If the original 2019 return was filed on paper, then you must use paper filing for the amended return. Ditto for the 2019 amended returns that reflect a different Social Security number of filing status from that shown on the original return. Amended returns for earlier years must also be filed on paper.
E-filing an amended return won’t speed up IRS processing of the form.
It can take up to 16 weeks to process e-filed and paper returns. To check the status of a filed amended return, use the “Where’s My Amended Return” tool on IRS’s website, or call the automated phone line at 866-464-2050 three weeks after filing the return.