TDS Implication on Banquet (Hall) Hire

Hi Friends,

Our company acts as a Branch for a Parent Company in US.  Parent company conducted a training program in India for which 50% of the total amount remitted as Advance to the Hotel by Parent Company directly to Hotel in USD (without deducting TDS).

Now, parent company asked us to pay the Balance payment to the Hotel in INR after adjusting the advance amount paid by them.

May I know, should I deduct tax on the balance amount or for the entire amount including advance amount.

Thanks & Regards,