Want to know about Future Tense

I am businessman, sometime i stuck in a tense. Like today i have stucked; I was writing a mail to my client and i wanted to convey him that i need TDS certificate with in week and i was mentioning that; i would be requiring TDS certificate with in week's time. Can you tell me is it correct english?

[jamiep]

I suggest something like "I require the TDS certificate by next week".

[Anglika]

Originally Posted by Unregistered

I am businessman, sometime I stick on a tense. Like today I am stuck; I was writing a mail to my client and I wanted to convey to him that I need a TDS certificate within a week and I was mentioning that: I would be requiring TDS certificate with in week's time. Can you tell me is it correct English?

It can be understood but it is not good English.

In this context a simple future is better:

I will require the TDS certificate next week
I require the TDS certificate by next week
The TDS certificate will be needed next week