I e-filed MFS returns for my spouse and myself, including EFT payments due for both. Now, due to an error I discovered after e-filing, I will be re-filing (by mail) a MFJ 1040X, resulting in additional taxes due. I don't want to wait for the original (wrong) returns to be processed, as I might incur a late penalty.
For sake of this example, let’s say my spouse’s MFS tax bill was $1,000 and mine was $1,500. If my MFJ 1040X tax due is, say $3,000, do I submit a payment of the difference ($500), or do I pay the full $3,000, and expect the original $1,000 and $1,500 payments to be refunded?
