After you file

So you prepared a Form 1040X, Amended Return?   And hopefully, you printed, signed, and mailed it.  An amended return cannot be efiled.

Approximately 3 weeks after mailing, you should be able to start tracking it at this IRS site:

https://www.irs.gov/filing/individuals/amended-returns-form-1040-x/wheres-my-amended-return-1

It can take the IRS up to 16 weeks to process an amended return.