Hi there Keith751,
It's vital that all your transactions are correctly entered so that your books can be well balanced. QuickBooks Desktop is a great tool able to help you create and print cheques for your suppliers. I can provide some information about writing cheques.
When creating cheques in QuickBooks Desktop, you have the ability to write a memo or description for each line of the transaction. If using the Expenses section to select specific expense accounts to affect, you can add a Memo per line, and if you use the Items section to specify items for this cheque, you can add a Description per line item.
If you have any other questions, feel free to reach out here.