Honestly I'd start at irs.gov.  The 1040 instructions and Pub 17 will get you off the ground.

Here's Pub 17:

https://www.irs.gov/pub/irs-pdf/p17.pdf

And a preview of the draft instructions for 2020 Form 1040:

https://www.irs.gov/pub/irs-dft/i1040gi--dft.pdf

If you need a cure for insomnia, you can also read the entire Internal Revenue Code on the Cornell University website:

https://www.law.cornell.edu/uscode/text/26

Welcome to the asylum.

Rick

hahahaha that is so funny. Thank you for your advice!

https://apps.irs.gov/app/vita/ 

Thank you so much!

I’ve always considered these forums to be among the best resources for my practice. You’ll find help with program functionality and navigation from other users invaluable. If you get stuck or have questions about a specific tax situation you can generally get an answer... or at least pointed in the right direction. I’ve found that reading just reading through the posts and responses (arguments and discussions) results in good learning.  Every once in a while you might answer a question or two as well... 

as Rick said, welcome to the asylum.

Thank you. That's a good idea! I will try to read several posts each day.