You need to review the rejection email to ascertain what the reject code reason is. That email will also provide some steps to take to make the correction and resubmit.
The most common reject reasons are your 2019 AGI doesn't match or a social security number or birthdate doesn't match.
If the rejection persists, you can post the rejection code reason here and someone may be able to provide more specific guidance.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"