To add an additional receipt to an expense on the web portal follow these steps:

1. Go to My Expenses > Draft (under the Expenses heading).

2. Find the expense, then click the Edit icon next to it.

Note: You can also click the three dots icon and select Edit from the drop-down.

3. Attach a receipt to the expense by selecting either browse to upload a new receipt from your device, or choose an existing receipt.

4. Click Add additional Receipt + underneath your receipt image.

5. Attach any additional receipts by selecting either browse to upload a new receipt from your device, or choose an existing receipt.

6. Select the receipt you'd like to attach to the expense from the list.

7. Once you've attached the receipt, click Update to save the changes to your expense.