What does 'Your return is still being processed' mean?

This IRS message means your return is in the processing queue but hasn't been approved yet. This is normal, especially during peak season (February-April). It could mean your return needs additional review, you claimed certain credits, or the IRS has a high volume of returns. If this message persists beyond 21 days (e-file) or 6 weeks (paper), you can call the IRS at 800-829-1040.