Solved
Can you use direct debit for an amended tax return or do you need to mail check?
Within the TurboTax program, you will only be able to pay by mailing a check because the 1040X form does not provide ability to direct debit. However, you can easily pay online through the IRS Direct Pay site below - its free and when you make a payment it will ask what the payment is for and you can indicate Amended Return and 1040X.
https://www.irs.gov/payments/direct-pay
If you would rather use a credit/debit card, you can find that option below -
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