You will be able to amend as soon as Form 1040X becomes available. At this time the expected date of availability for the form 1040X is
02/05/2020 , however that date is subject to change. You can track it's availability by going to the following link.
https://care-cdn.prodsupportsite.a.intuit.com/forms-availability/turbotax_fed_online_individual.html
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
