You can follow the instructions here to amend your 2019 tax return.
Can you tell us when the amend for 2019 will actually be available? Because it's not right now, I have received my refund and it tells me that option is not available until late February.
Unfortunately we don't have an exact time when the form will be available. Please check back at the link provided:
That's fine, but I think other specialists shouldn't be telling people it is "live" when the option is not there yet to do it for 2019.
To amend your 2019 tax return: Wait to see if your return has been accepted or rejected by the IRS or state. If rejected, you can correct and re-send your return. If accepted you should wait until your return has been processed and you receive your refund or conformation that any tax due has been paid. If you file an amended return while you first return is being processed it can cause extended delays for both returns if two returns are in the system at the same time. In addition, if the IRS makes any change on your original return, you might end up having to amend the amendment. Amended returns can only be mailed - allow 8-12 weeks - can take up to 16 weeks (4 months) for processing. This Turbo Tax FAQ will show you how to amend your return.
How to amend (change or correct) a return you already filed. https://ttlc.intuit.com/replies/3288565