Tds wrongly deducted 2% instead of 10% for hotel rent

You can obtain form 26A from the CA of the hotel stating that the hotel has included the amount paid by your client in its total income, and had paid the tax on the same and has filed it's ITR within the due date of sec 139. in such a case there is no need of disallowance of expenditure due to non deduction/short deduction of tds

its better to pay the difference amount along with interest.