@cruxxie wrote:
I'd like to amend immediately since it will change my refund amount.
@cruxxie Filing an amended return right away will not stop or modify the processing of your original tax return. The original return and the amended return are processed separately. You will still get the refund shown on the original return, even if you have filed an amended return. Since you will be reporting additional income on the amended return, you will have to pay back part of the original refund. There is no way to avoid this.
There is always a possibility that the IRS will change something on your original return, unrelated to the omitted alimony income. If that happens, you have to take the IRS change into account in your amended return. That's why you have to wait. If they make a change to your original return, and you have filed an amended return that does not take the change into account, it will cause confusion, a lot of correspondence between you and the IRS, and resulting delays.
