The IRS doesn’t have all the information needed to file our returns (they lack basis information for many securities transactions, they lack basis information for my real estate, they lack all/almost all the information about schedule C small business or schedule E real estate investments, they have no information about my charitable giving, etc.).

Even the information they do have is not all available on your account transcript until mid/late summer.

With some substantial investments they could probably generate pre-filled forms for the simple cases by late March. I’d support that, even though it wouldn’t help me at all.