The IRS doesn’t need those details, there’s no way to add them to the form. If they have questions, they will send you a letter later.  At best, you could file by mail and attach a written statement, but written statements that are not required are often lost anyway.

I need those details just like you can do it in very many other places for my own record keeping. Adding supporting details that are not reported to the IRS is possible in many places in the program. Just think this feature should be added to the program.

Technically speaking, when your tax return is e-filed, TurboTax creates an XML file that is uploaded to a data warehouse. The IRS downloads that XML file and imports it into their system for processing. TurboTax cannot include anything that is not already approved in the IRS‘s XML specifications, or the return will automatically be rejected.  No tax preparer can change the specifications of the XML file, no matter how good an idea it might be. Only the IRS can do that.

I don't think you understand what I am asking for.

Prior versions of Deluxe were much easier to add supporting detail.  I used the Forms worksheets to add detail on my property taxes this year.

I've used TT for decades and all you had to do previously was right-click and up pops the Additional Details box. Having to highlight the field, then click edit on every single entry where you want to include additional information is terrible. TT should fix this immediately and include the fix in the next update to the software.