If you have filed your return and the status in your dashboard is Awaiting Acknowledgment, then below points may apply to your return filing:
1. The return has been submitted to Income-tax Department and we are awaiting a response from them. This usually takes 5 minutes but occasionally may take more time. If it is more than 24 hours then please mail us with your PAN and username at firstname.lastname@example.org
2. The return filing has some errors. In such cases Income-tax Department reverts with the error message and we can correct it by reviewing it. Sometimes we have to contact you to get this corrected.
3. The return went on to our review team for checking due to certain data entries in your filing which the system felt is needed to be verified by a tax expert before confirming it to the Income-tax Department. Such case gets reviewed in 3-4 working days and is then filed. In case any issue is detected, the tax team will contact you to sort it out.