I am talking about the Australian situation. I canu2019t speak for the IRS.By u201cpay the wrong accountu201d do you meanYou paid the amount of tax that you owed but into someone elseu2019s account egby using the wrong account number orYou paid the amount of tax that you owed but into another of your ownaccounts eg a business account instead of a personal accountThe former is urgent though not so much as it used to be. Contact the ATO andtell them what you have done. Provide as many details as you can including thedate and exact amount of the payment along with the method of payment. If itwas an exotic amount eg 1439.36 we should be able to find it quite quicklyand transfer it to your account a payment of 1000 not so much.The hurry is that the amount will probably come up as a credit on the otherpersonu2019s account and we might refund it though we tend to hold ontopayments rather than refunding them.If you paid it into your own account but the wrong one chances are it willcome up as a credit on your own account the system will pick it up and flagit for transfer to the correct account.