An amended return with money owintg was processed before a first return. with a refund covering it. The bank refused the debit. It is now covered. How can I pay the IRS?

After submitting a tax form where I forgot to include SS incovme I submitted an amended for with tax owing, which would have been covered by the return. The IRS processed the amended form first, but the money owing was not covered in the designated account, and was refused by the bank. It is now covered. What should I do to pay this amount?