Any suggestions on how to learn more about tax lien investing?

I'm expecting a major tax bomb impacting millions of Americans to hit Q1/Q2.  You can't hand out $700 of state unemployment, $600 federal, with hold $0 taxes and expect the American public to be financially savvy enough to save a portion for taxes.

I expect some unemployed could be looking at a $10,000 plus tax bill who've never owed taxes before.

I'd imagine this is going to inevitably saturate the tax lien market, driving down prices, so I'd like to start learning more now for when the ish hits the fan.