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Tatkal Passport is a scheme available citizens who need their Passports urgently. In this scheme, the Passport is dispatched within 1 working day excluding the date of submission of application if police verification is not required, and in 3 working days, if it is required.
To apply for a Tatkal Passport, follow the procedure given for obtaining a new Passport, and check “Tatkal” in “Type of Application” while filling out the application form.
If you require any additional help and support, please see here.
Check out this Government FAQ to know more