Finally Logged in to IRCTC during Tatkal Hours after 2 years. So here's the easy way to book Tatkal Ticket and Normal Ticket whenever we are unable to Login to IRCTC:
Step 1: GO to air.irctc.co.in
Step 2: Enter your User ID and Password by clicking on Sign In.
Step 3: You also have the option of saving Password if you want faster login....
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Step 4: Click on Trains , You'll be forwarded to Railway IRCTC site.
Note: It works even during rush hours when irctc.co.in doesn't opens. I tried this out just now