I want to pay a suppliers invoice in QB's by the directors loan account as he paid a business invoice personally. How do l do that?

I'm here to guide you on paying a supplier's invoice using a director's loan account since the business invoice has already been paid personally, accounts-water.

First, ensure you've set up a Director's Loan account.

Then, let's record the expense paid using this account by following the steps below:

1. Click +New and choose Journal Entry.
2. On the first line, select the Expense account used for the supplier's invoice.
3. Enter the purchase amount in the Debits column.
4. On the second line, pick the Director's Loan account. If it's not showing, you can create one by tapping +Add New and completing the required details.
5. Enter the same amount in the Credits column.

Regarding the reimbursement, you have the option to record it as a cheque or as an expense.

For proper guidance on creating a journal entry and handling procedures, it's advisable to consult an accountant. 

I'm just a post away if you have further questions or require additional assistance managing bills or invoices in QuickBooks Online, accounts-water.