Could use some help with the following:

I created a spreadsheet to track payments made to contractors. In this
spreadsheet I have a simple formula that tells when the payment has to be
made based on the date it was rec'd from the contractor and adding on the
payment terms.

Now what I have to do is add in some date constraints. Our paying office
only processes payments between certain windows during the month. Lets say
that for this month the payment window closes Jan 27th to Feb 2nd. What I
need to do is if after someone enters the date the payment is rec'd and the
14 days is added for the payment terms, should the date the payment is made
end up falling within the payment black-out period (Jan 27th to Feb 2nd), I
then need excel to adjust the must be paid by date to 3 days prior to the
black-out period.

Hope this makes sense....I've tried a whole bunch of different things and
have looked online at several sites with no luck. Would SERIOUSLY appreciate
it if someone can help me!

Thanks!