DAVID GREENE, HOST:
Imagine a world with no tax returns.
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GREENE: OK, it's just a fantasy. But actually, in some countries taxpayers can sign up to receive simply a bill. The government sends you a tax bill, you pay it and, voila, that's it.
Now, there was an effort to bring return-free filing to the United States, but that effort came up against stiff opposition. And to find out why, we called Liz Day of ProPublica. She's been digging into this issue.
Liz, thanks for joining us.