Retirement tax questions

Thank you so much for your detailed reply!
I just have one follow-up question.

You say that I would have to file an amended return for 2019 if I didn't already include the $7000 IRA contribution on my 2019 tax return. I actually did include the entire $7000 on the 2019 return; I just didn't realize at that time that it was more than I was entitled to for a deduction. So, since I already included the $7000 IRA contribution on my 2019 return, do I still need to do an amended return? If so, what would need amending? From what you said, it doesn't sound like I need to but I want to be sure.

Thank you!!