So many people offering explanations, and yet not a single one of them answers the OP's question. If you're upset that Intuit is engaging in lobbying (as you should be!), that might be an appropriate answer for a different question (eg: why doesn't the IRS just send us their own reports for us to approve?). Again, I am not defending Intuit's involvement in politics, but that's not the answer to the dark patterns ques…
The truth is the IRS doesn't send reports because this country is obsessed with deductions. Your income (which the IRS does know about) is a small factor in the entire equation.
Ironically, under Trump's tax cuts, the standard deduction was made a lot larger (while removing the availability of some deductions). This pissed off the people who loved those deductions, but in the end it made the standard deduction applicable to a lot more people.
If you aren't taking deductions, then you can just use any of the services for free and don't really need to worry about dark patterns.