I first used Credit Karma in college, which made me aware of my credit score. Credit Karma had a credit simulator at that time, which I would play around with to see what was the best course of action to get my score up up in a very short amount of time. I got to where I want and will maintain it.
Credit Karma's tax solution is the best I have ever used for my case! I still use Mint, but it is in maintenance mode. I can only hope that the CK's tax solution stays intact in not a transition to TurboTax.
The for-profit tax companies already screwed up with the IRS revamping the agreement, so as to compete with them: https://www.propublica.org/article/turbotax-is-still-trickin.... I hope the government will take good advantage of this opportunity.