Amendments can be efiled, BUT the IRS only allows for current year and two prior. I do not know what NYS does. You need to do some research. Maybe you can efile an amended for NYS, but you can not efile an amended for IRS for 2019. That one is a paper tax return. 

https://proconnect.intuit.com/support/en-us/help-article/federal-taxes/amend-individual-return-1040x...

https://www.irs.gov/filing/amended-return-frequently-asked-questions#:~:text=Yes.,electronically%20f....

https://www.irs.gov/e-file-providers/benefits-of-1040-modernized-e-file 

"Prior Year Returns – MeF allows filing of prior year 1040 returns. As a new tax form type is added to the MeF platform, tax returns will be accepted for the current tax year only. As subsequent tax years are added to the system, MeF will accept the current tax year and two prior tax years.

For example:

• In January 2015, 1040 MeF accepted Tax Years 2014, 2013, and 2012.
• In January 2016, 1040 MeF accepted Tax Years 2015, 2014, and 2013.

Note: MeF does not accept prior year extensions (Forms 2350 and 4868)"