If you were using the TurboTax desktop editions for 2023 you could use the What-If worksheet in Forms mode.
If you were using the TurboTax online editions, you could start a new 2023 tax return with a new User ID to make estimates.
Or you can use the TurboTax calculator TaxCaster - https://turbotax.intuit.com/tax-tools/calculators/taxcaster/
