Can one add Explanation Worksheets within Turbotax?

In TurboTax can I add explanation worksheet on my own to explain certain expenses or deduction?

 

Example

From 1116 (foreign Tax Credit). I only entered Tax paid but software automatically fill in deduction of itemized/standard deduction and then software will pop open explanation sheet. Now I have to fill in that Explanation  worksheet that deduction is standard/itemized deduction ( Sch A). I have only seen explanation worksheets with form 1116 and again it was opened by software.

 

I am using this example and my question is NOT related to form 1116. It is general question. Lets say if there is some thing which is tricky so is there a way to enter/attach explanation worksheet on my own? If yes how?

 

I will filing online so not sure what happens to these explanation worksheets once you file electronically. Do they send over to IRS along with your return?