How do I run a tax simulation for 2024?

[hlees]

how do I run a tax simulation for 2024 using last year's tax data?

[DoninGA]

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/

[NCperson]

I prefer using this website: 

https://www.dinkytown.net/java/1040-tax-calculator.html