If you received a message stating that your federal and state amended returns were electronically filed and accepted, then they were successfully submitted. You can also contact us with the information in this link to confirm the status of your amended returns.
If you elected to make any payments electronically, then you would not need to mail in the payment voucher. However, if you did not set up electronic payment for the amount due, you will need to mail the payment with the voucher as instructed.
In regards to Form 8949, if there are no changes to the form as originally filed, you would not need to mail this form in either.
Please see the following links for more details on tracking your amended returns after they have been filed.
Can I e-file my amended federal return?
Where's my amended return - IRS
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