The IRS expanded its CP53E guidance with fresh information on QR code security, online account access problems, and how taxpayers can confirm successful bank account updates.

Most refunds arrive within 21 days after the IRS accepts an electronic return, the agency says. The timing of your refund may change for amended returns, errors, or if you claim the Earned Income Tax Credit or Child Tax Credit. If you e-filed, you can usually check your refund status within 24 hours using the IRS' " Where's My Refund? " tool.

The Internal Revenue Service has improved its ability to flag returns for signs of identity theft, adjusting its filters to reduce false positives and spot fraud.