Thank you for the response, in regards to timing the amendment, but I still can't understand why the two prompts with not ability other than to choose continue occur. I am trying to prep the amendment for when it is appropriate to send (per your recommendation - post receipt of the original return), but I am concerned about items which are detected by TurboTax as "in error", but have no means to fix. As I said, I deleted the form, already, so I am not sure where the info about such is still "cached", especially as it identifies the school having been attended by my son.
