In reply to Rupan.
You may want to check your eligibility beforehand:
– https://www.99.co/singapore/insider/buying-bto-process-procedures/
– https://www.hdb.gov.sg/cs/infoweb/residential/buying-a-flat/flat-and-grant-eligibility/couples-and-families
One key thing to note is that you must not: 1) own any other property 2) sold a private property within 30 months before you apply for BTO.