Amending 2019 - Real Instructions?

I used Turbotax Home and Business to file 2019. I found a couple of mistakes and I want to amend my return and pay the tax I owe. Why is the process of using Turbotax to amend so vaguely explained and demonstrated?

 

There is no video that shows me what happens after I click the "Amend" button. Perhaps I should just click it and move on, but there is also no information regarding any potential communications between Turbotax and the IRS, if I do click the button. I believe the answer is that there is no communication but a simple video on this topic that actually shows a return being amended would help me feel better about this process.

 

Also, I found no clear steps posted for amending The steps I did find, your attempt to address my concern, are not accurate because they make vague references to this feature. Does clicking the Amend button allow me to make a copy of am I supposed to do that first? 

 

Also, does the product help me amend state taxes since your product is used for filing both Fed and State taxes.

 

Where can I find clear and accurate information about what happens once I click the Amend button???