See https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-2021-return/L1gEU4G3X_U...
If you need to amend multiple past year returns, you might be better off consulting a local tax professional.
https://taxexperts.naea.org/listing/service/individual-tax-preparation
View solution in original post
