Yes, the original return and payment will be processed as you scheduled them unless you cancel the payments. You can't arrange a debit for an amended return, so the additional payment needs to be made by check.
So, it is your choice,
- You can mail the amended returns with the additional payments shown on the amended forms, and let the originally scheduled payments happen on the dates you scheduled, or
- You can cancel the payments you set up and just pay the entire amount with the mailed amended return.
As far as the address, use the one TurboTax shows you on the instruction sheet for 1040X. If you can't find that, follow this link and use the address for your state.
You cancel the payments by calling the IRS and your state, so the first option is definitely the easier one.
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