If you're selling your current flat and planning to buy one or two new properties, you can include your wife's name on the new purchase. This is permissible even when reinvesting capital gains and will not affect your eligibility for long-term capital gains tax benefits under Section 54. Each co-owner can claim exemptions. Additionally, if you're a senior citizen selling your only property due to debt, consult a local CA regarding potential LTCG exemptions based on income thresholds and how to manage sale proceeds.