1. All my incomes are automatically filed. 2. Each month I say "yes this is correct" on the website, and pay immediately via any bank. 3. At the end of the tax year, the system calculates if they own me money automatically, I give it my bank account and in some days I have my return.
It even handles tax deductibles and everything.
An archaic, windows-only Java app to generate pairs of password-protected keys, which then have to be fed back into the system to declare your tax status. And they expire every so often, so you have to track down your old keys from years ago and remember the password. Confused? Just set up a SAT appointment, they'll be with you in... weeks.
Having to declare your tax categorization multiple times per year.
Facturas that companies will only generate for you for a limited amount of time, and complicated questionnaires to fill out if you DO want one so you get the right type. Assuming they'll even give you a factura at all.
I fully admit that I have an incomplete understanding of the system, this is just what I've seen my wife try to deal with. And she's the equivalent of a 1099 so her situation may be more complicated.
They do have such a portal which does some of the things you list and several other things too.
https://www.irs.gov/businesses/business-tax-account
How do we know that your list better matches the most common desired/needed features than the initial implementation by the IRS?
IRS business features:
Sole proprietors with EIN
A sole proprietor who files with an EIN can:
View business balance due
View business tax records
View select digital notices
Request a tax compliance check
View business name and address on file
Give account access to your employees
Register for clean energy credits (if eligible)
An individual partner or shareholder with access can:
View business balance due
View business tax transcripts
View business name on file
Unfortunately it can't do everything, but you can get your tax notices there, check filing status, refund status, get tax transcripts, etc.