Late Form 1099-B after Federal Taxes Filed

Hello,

 

Just got a 1099-B from Acorns (2-21-2021) an account that I'd forgotten about since it wasn't much money. Federal and State taxes have already been filed and accepted. I plugged in the late 1099-B and neither Federal or State refund amounts moved at all! So, do I need to amend my return anyway?

 

Any advice greatly appreciated!