I’ll start by plugging Harvard’s free courses catalog as well as Udemy
Edit: Gonna add 2 more I remembered-
Blender - I wish I had more time to learn it, but I did start the infamous “Donut Tutorial” once!
Watch Cartoons Online - Lots of good older stuff!
A little late but OpenTaxSolver - free desktop tax software that gives you a printout of tax forms that you can mail in. And it includes a few states too. Way easier than the annoying corporate sites that constantly log you out and charge a fee for every little thing.
Since you mention states and the site mentions federal taxes and the IRS, I assume this is for the tax system of the USA, it’s funny that it isn’t stated anywhere though.
the USA is the only country that I know of that requires such ridiculous measures to file your taxes tbh