After you file

I would not resend anything. If the IRS finds something wrong they will send you a letter with the amended return and let you know what you need to change or do.

Amended Returns & Form 1040X 3 | Internal Revenue Service

You can also verify with the IRS, by following the contact instructions below:

How do I contact the Internal Revenue Service (IRS)? 

Note: 

You will need to follow the prompts in order to speak to an IRS agent. There is a high call volume this time of year.

When calling the IRS do NOT choose Option 1.   

Choose Option 2 after you choose the language.   

Then Press 1    

Then Press 3   

Then Press 2, it will then transfer you to an agent.