Hi Raman2121, thank you!
I provided the following:
Application form for Partnership-Based Temporary Visa
Form for Partner’s Supporting Partnership-Based Temporary Entry Applications
History Of Relationship Letter ( 1 & 1/2 page long)
Evidence of letters sent to same address
Evidences of communication and contact (including screenshot and logs - I included mostly household activities/shopping list convo)
Evidences of time spent together (4 pages of screenshot pictures - from year 2013 to present)
Flights/accommodation evidences
Joint bank account statement
Support Letter From Family and Friend
Wedding Certificate
Good luck on your application - hope this helps.