Attention auditors !

for the first part yes surely u can suggest ur client to deduct TDS according to rules, pay the diffrential amount , and get TDS return revised....... this can be done anytime before date of filing of return..... for second part even i am not sure of any remedy..... but surely he can settle the amount for any further payments.... also if client is not ready to deduct Tds he can get this amount disallowed and get it allowed as expenditure in next AY in which Tds is deducted and payment is made