Meanwhile, Politico's morning tax letter reports:

Thousands of foreign workers who were recently employed in the U.S. received stimulus payments. "College-age workers who spent time in the U.S. in the last two years — some of whom returned home long before the coronavirus pandemic — have been surprised to find $1,200 checks deposited into their bank accounts," a Politico writer reports.

The error stems from foreign workers turning to TurboTax and other e-filing systems without knowing that they're designed only for U.S. residents; they should file non-resident paperwork instead. Accountants who specialize in non-resident taxes have been flooded with calls about mistaken payments.

But with no clear guidance on how to return the money, those who received the surprise check are holding onto it or racing to spend it before the IRS realizes the mistake.