Hello Sir,
Sir,as you have query about Delhi-Agra-Chandigarh & Punjab-Amritsar(Golden temple) then you need 5 or 6 days to complete your trip destination.
You can visit Agra sightseeing places in one day but if you like 2 days in Agra then it will be good.Here I want to little describe you your tour destination main attractions :
Agra: Taj Mahal,Agra Fort,Fathepur Sikri. Sikandra Tomb and other Mughal monuments and Market
Delhi: Red Fort,India Gate,Jama Masjid,Humayun's Tomb,Qutab Minar,Lodhi Garden,Lotus Temple & Market
Chandigarh: Rock Garden,Rose Garden,Pinjore Garden,Cactus garden,Museum & Art Gallery
Amritsar:Golden Temple,Jallianwala Bagh,Wagah Border,Ram Bagh Garden,Harike Wetland and Bird Sanctuary & Market