Retirement tax questions

Thank you very much! 

For the 2020 amendment - do I physically have to send an amended return for the recharacterization and provide an explanation for the amendment?

For the 2021 Form 8606 - I was assuming that Line 14 would have a total basis of $14,000 ($7K for 2020 and $7K for 2021 contributions).  I'm not sure if I answered something incorrectly, but line 14 is showing $7,000.  Is that correct?