The product is fine. It doesn't really need radical improvements. That money should have been returned to shareholders.
What it needs is to not exist. The product does a fine job of doing an unnecessary thing. For the vast majority of users it should be a tax bill or refund check that arrives with no user intervention at all.
The remaining use cases should be handled differently -- perhaps by a professional. That professional may themselves want such software, but it's likely a different interaction than software also aimed at users with much simpler use cases.
What it needs is to not exist. The product does a fine job of doing an unnecessary thing. For the vast majority of users it should be a tax bill or refund check that arrives with no user intervention at all.
The remaining use cases should be handled differently -- perhaps by a professional. That professional may themselves want such software, but it's likely a different interaction than software also aimed at users with much simpler use cases.