You can create a director's loan account in your Chart of Accounts in QuickBooks Online. That way, you can track the computer you've purchased through that account.Here's how:
Click on the Accounting tab.
Click on the Chart of accounts.
Click on New.
Under Account type choose Liability or Current liability account.
Enter the Name of the account like Directors loan or how you want to show on your report.
You can enter an amount in the Balance field.
Click on Save.
Then, you can create an Expense transaction and use the director's loan account under Category details, and choose the Credit card account under Payment account.