After you file

If that is the total amount of interest received then there is no need to file an amended return.  If you had no income of any kind in 2021 or in 2022 other than that amount of interest,  then there was no need to file a tax return.

 

Unless you had healthcare insurance through one of the state Marketplace Exchanges or from healthcare.gov and received a Form 1095-A then you would have to file.