Tax Liability on STCG and LTCG

No tax liability in either case...

Short-Term Capital Gains (STCG) are taxed at 15% (on listed equity shares/equity mutual funds) if sold within 12 months, while other assets are taxed as per your income tax slab. Long-Term Capital Gains (LTCG) on equity above ₹1 lakh are taxed at 10% without indexation, and for other assets, generally 20% with indexation.

Same case with me. do suggest do need to pay tax , i have sort term income of 2.8L and no other income 

No. No tax liability under New regime.