If you've paid your tax, received a CIN, but the CRN status shows 'payment failed', don't panic. This can happen, especially if there was an issue with the initial payment attempt. The BSR code generation usually indicates successful payment, and the 'failed' status might be a temporary glitch. It's advised to wait up to two days for the system to update automatically. If the amount is credited back, you may need to re-initiate the payment. You can verify your payment status and re-download challans directly on the Income Tax e-filing portal.