The IRS will not accept an amendment electronically. Amended tax returns must be printed and mailed into the IRS and the state. If you did not print and mail your amended return, it was not filed.
If you did print and mail your amended return, keep in mind that amended tax returns can take a while to be processed by the IRS, especially during tax season.
Once the amendment has been sent in, the IRS has a tool on their website where you can check the status of your amendment. See the link below.
https://www.irs.gov/filing/individuals/amended-returns-form-1040-x/wheres-my-amended-return-1