The difference in your refund is $1,400 as you say @Thompson 1. That's the amount of the stimulus payment. It looks like the IRS adjusted your refund because you claimed that you did not receive a stimulus when you actually did.
The IRS will send you a letter explaining the change. There will be a number in the top right of the letter to call if you want to discuss it with the IRS.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
