Firstly, I'll ask that you please, please perform a search to see if your deal has already been posted. If you're not too familiar with the search system, there is a handy help thread here.
To create any thread on HUKD, be it a deal post or a conversation topic in the misc forum, they all start from the same point, the "submit"" button, up at the top left. >>>
You'll then see this page:
Choose one of the categories by clicking on:
Deals: Use this for specific items for sale at a set price . eg: TFT Monitor at £100 , DVD at £17.99 , Book at £7.50 and so on... You can also use this for Sales in general. eg: Up to 70% off at Debenhams. You can also use this for information or advice that will save people money or help them receive special offers .
Vouchers: Use for any discount codes that give money off, special links that reduce a price or groups of codes for specific goods discounts.
Freebies: Use this ONLY for a totally free item with no sale value. downloads should ONLY be posted in the Free Software thread
The other categories are separate areas of the forums, and this help thread will focus on the deal posting areas above.
In this example we'll submit a thread for the "deal" category.