A 1099Misc you received or need to issue to someone you paid? If you already filed your 1040 tax return you need to amend it to add another 1099Misc you received unless you included that income on Schedule C from your own records.
How to amend a 2019 Online return
https://ttlc.intuit.com/community/amending/help/how-do-i-amend-my-turbotax-online-return/00/27577
Yes you have to print and mail amended returns.
