filing taxes as uber driver with EIN

so I’m now learning that in order to contribute money to a solo 401k that I will need an EIN. Ok cool I can get that easily for free from the feds.

I can also contact a company I contract with like Uber and have them update my tax standing to use my new EIN. Ok cool easy.

So now the 1099 will show this new EIN as having income instead of me.

But then I guess I would need to file a completely different set of taxes for this new federal tax id number right?

And because this is my only income, that means I would have no income, so I would lose out on the standard deduction?

(no I’m not asking for specific tax advise)