I don't agree that you have to be a tax pro to efile an amended tax return. The IRS page states you can efile and Turbotax also states the same thing
Can I e-file a Form 1040-X?
Yes, but only for tax years beginning with 2019. Also, your originally filed tax return has to have been electronically filed for your amended return to be eligible for e-file.
The IRS has set up a new system to handle amended returns going forward with 2019 but you still cannot e-file returns for years prior to 2019. You must print these earlier year amended returns out and send them in by mail.
Not all tax software providers support electronically filing amended returns for other than the current year. If not then you will need to file your amended on paper and mail it to the IRS.
