Retirement tax questions

Thanks so much for the info.

 

Just curious. If i had taken a loss on my excess contribution instead of making a gain, would that loss then be a deduction in my 2018 taxes (just like it was a taxed gain when i had a gain)?

 

I ask because i overcontributed this year too (for 2019 tax), and therefore i wanted to proactively enter the transaction when doing my 2019 taxes so i don't have to ammend later when i recieve the 1099-R. Would i just enter a negative number in box 2b since it was a loss?