Estimate Taxes for 2024

Greetings all. I'm using TurboTax Desktop for 2024. I've had an additional income source in 2024 and I'd like to get an estimate of what my total tax liability will be including this new source. 

What's the best way to do this?

I'd like to get this now in case I need to pay in a lot, and may want to offset some of it via donations, etc.

I saw that TurboTax has an online estimator, but I've always done my taxes using the desktop version and I don't know if the online estimator will work for me.

Thanks.