Query on filling the dependents' application forms

Hi,
I'm filling the online form for Tier 2 General (Dependents). I came across the following question:

When is the job expected to finish?

I'm bit confused what date to fill in. I have got the Certificate of sponsorship valid till Aug 2012. The Statement of Work (SoW) for my work assignment is signed till December 2011(though i have good chance of extension for the whole of next year).
Can you please advise what date i should fill in (SoW date or CoS date)?

Thanks in advance,
senthil.

If there is no indication that the job will terminate then you can leave this blank and explain why in the notes

Hi,
Thanks for the reply.
Unfortunately it is a mandatory field in the online form and i cant proceed further without entering a date. Any other suggestion?

Thanks,
senthil.

Put a date 10 years in the future and then explain in the notes.