You haven't given us a lot to work with.
If you want a formula that returns Yes or No based on whether a date is more or less than a year from now, then try this:
Contract Less then
1 Termination one year
Date to go
2 04/Nov/11 No
3 30/Nov/11 No
4 24/Jan/11 Yes
5 08/May/12 No
6 26/May/11 No
7 05/May/12 No
8 08/Jul/10 Yes
9 29/Mar/11 Yes
10 24/Apr/12 No
In Cell B2 enter this formula:
=IF(INT(A2)-TODAY()<365,"Yes","No")Drag this formula down alongside the contract termination dates in column A.
The formula is 'universal' in that you can copy it and paste it into another column to the immediate right of another column of contract termination dates.
If you want more, please provide more details of what data you already have and what cells the data is in.
I am presuming that the contract termination dates are in a standard date format recognized by Excel as a date.
In the above example if you enter =A2+1 into an empty cell it will show 05/Nov/11. This shows that the date in A2 has been recognized as a date. Adding 1 to it returns the next day.