The IRS says it could take 12-16 weeks to process an amended income tax return. You can get confirmation, that the IRS has received your amended income tax return, through Where's My Amended Return?
This is directly from the IRS website
Amended Return Frequently Asked Questions | Internal Revenue ...
How long will it take to process an amended return?
- A Form 1040X, Amended U.S. Individual Income Tax Return can take up to 16 weeks to process once we receive it.
Will calling the IRS help me get my amended return processed any faster?
- Calling us will not speed up the processing time of your amended return. Our phone and walk-in representatives can only research the status of your amended return 16 weeks or more after you’ve mailed it; or if Where's My Amended Return? itself has directed you to contact us.
How will I know you’ve received my amended return and are processing it?
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Where's My Amended Return? follows the processing stages of your amended return from receipt until completion. It will tell you if your return is in received, adjusted, or completed status.
What is happening when my amended return’s status shows as received?
- We’ve received your amended return. We are processing it. It can take up to 16 weeks to complete processing.
What is happening when my amended return’s status shows as adjusted?
- We’ve made an adjustment to your account. The adjustment will result in a refund, balance due, or in no tax change.
What is happening when my amended return’s status shows as completed?
- We’ve completed processing your return. We’ve mailed you all the information connected to its processing.
How often does the tool update?