Step 1: Recall the surveillance need. The Revised National Tuberculosis Control Programme required a single digital register to follow every notified TB case nationwide. That register is NIKSHAY.
Step 2: Etymology aids recall. The term fuses the Hindi syllables NI and KSHAY, conveying the idea of wiping out tuberculosis - a built-in mnemonic for the answer.
Step 3: Operational detail. Hosted at www.nikshay.gov.in, it is a web-based platform jointly built by the Central TB Division and the National Informatics Centre and rolled out in June 2012 to give all concerned officials live access to patient data.
Step 4: Rule out alternatives. NICHAY and NIRBHAI are distractor coinages, and E-DOTS does not denote this national TB monitoring software.
\[\boxed{\text{NIKSHAY}}\]