Paying Vendors HBR

If you want to keep it simple, you can pay your vendor directly from your checking or credit card account. Just categorize the transaction to one of your Business Expense categories, without first creating a vendor invoice. I'd do this, e.g., for a quick trip to Office Depot to buy office supplies and pay with a credit card.

OTOH, yes, you can create a Vendor Invoice in your Vendor Invoices (Accounts Payable) account. Categorize each line item to an appropriate Business Expense Category. While still in the Vendor Invoices account, to pay the vendor create a New Payment to vendor transaction, select the account to pay this invoice from in the "Withdraw from" field and select which vendor invoices you wish to pay with this transaction. If you paid from your checking account switch to its register and write (or print) the check and mail it.