Do NOT change anything on your 2021 tax return that has been filed.
If you want to estimate your 2022 taxes you can either start a new test 2021 tax return using a New User ID or you can use the TurboTax calculator TaxCaster.
Go to the TurboTax website for the online editions and create a New account with a New User ID - https://turbotax.intuit.com/personal-taxes/online/
Go to this TurboTax website for TaxCaster - https://turbotax.intuit.com/tax-tools/calculators/taxcaster/
