Retirement tax questions

Thanks fanfare. 

 

What do you mean by "If you e-File 1040-X with TurboTax, TurboTax sends the entire tax return again"?

 

Yes, I was planning to use TurboTax. I am waiting for the 3rd party to send me the 1099s to submit with the 1040x. Do I need to be aware of anything else?

 

Thanks.