Five steps from a problem to its solution.

Help me design and build a first working prototype for this problem in Patna, Bihar, India.

Problem: Married women applying to teach in Bihar can't easily tell which certificates, from whose address, they need to claim reservation.
Who it hurts: Women applying for BPSC's TRE-4 teacher recruitment, especially those who married into Bihar from another state or whose certificates carry their husband's address.
The moment it hurts: Filling in the TRE-4 application before the deadline, or reaching document verification, and finding the caste, residence or non-creamy-layer certificate is from the wrong address.
What people do today: Candidates piece the rule together from news reports, coaching blogs and the BPSC notice, and many hold certificates made after marriage at their husband's address.
Why it is still unsolved: The rule differs by case (Bihar native or not, reservation or open seat, EWS or other category), it sits in recruitment rules few candidates read, and a mistake only surfaces at verification.
What solved looks like: A free checker in Hindi and English where a woman answers a few questions (where her father's permanent address is, which category she claims, whether she lives with her husband) and gets the exact list of certificates, which address each must carry, and whether she competes for reserved or open seats, before she applies.
Where: Patna, Bihar, India

First, list what you would need to learn from the people affected before building, as interview questions.
Then propose the simplest version that would help, the screens or messages it needs, and the data it would use.
Keep it cheap to run, accessible, and respectful of people's privacy. Flag anything you are unsure about instead of guessing.