For the I-134, they list all the possible things you can submit. You don’t need to bring all of them. You need to provide something that shows your income, not multiple things. Just get the federal tax transcript from the IRS. That is plenty. It comes straight from the IRS and clearly shows what you made, is easy for the agent to read and understand, and is less likely to be faked.
https://www.irs.gov/individuals/get-transcript
For us, they just looked to see if we brought it, and then ignored it. Good luck on your journey.