1099 NEC

I just e-filed a 1099 NEC for the first time and had a few follow up questions:

1. The person I paid to was ok with me emailing them the form and I did that- do I also need to mail them a copy even after they confirm receipt of the form?

2. After clicking e-file on https://quickemployerforms.intuit.com/, it says e-file processing: when I hover over it, it reads "your forms are being processed by IRS"- am I done with the process or do I need to do anything else?

3. Do I need to file anything for state tax purposes?

4. Eventually,when filing my taxes, I simply enter the amount in 1099 NEC as an expense and don't have to do anything else, correct?

 

Thank you!