Hello @Tony Truong,
We're unable to submit a new set of 1099 forms after successfully filing them electronically through the online system.
With this, I'd recommend contacting the IRS to let them know about the amendment of your forms and one of their specialists can guide you on how to submit the corrections.
In the same manner, here's an article you can read to learn more about the compliance updates from your agency and how you can reach them: Internal Revenue Service Payroll Tax Compliance.
On top of that, I've got you this helpful article for guidance in preparation for the 2020 tax season: QuickBooks Online Payroll Year-end Checklist.
If there's anything else that I can help you with, please let me know by leaving any comments below. I'll be here to lend a hand.
