Gst on expenses reimburse from client

You have to Make Invoice for what work you do. If your payee, want Invoices mentioning Travel expenses separately. Then you can make as per their requirement.

Generally, As a Consultant I give my Invoice as

CONSULTATION FEE 5000 x 1 = 5,000/- 

That's it, No need of mentioning, 500 Cab fee, 400 rupees print expenses, 550 return cab fee, 700 lunch expenses, 2000 My advise expense, 500 Daily Allowances, 350 Miscellaneous etc.

In Second Example, If you ask for Monthly Bill from you Milkman, then he didn't give detailed expenditure list, He just give you bill as  MILK [BUFFALO] @ 45/LITRE x 25 days =  1,125/-