You have to wait. If your efile rejects you can add it and resend your return. If your return is Accepted, you need to wait for it to be fully processed and you get the first refund. Then you can Amend.
How to Amend the current year
https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-federal-tax-return-curr...
