I sent 2 invoices, one for my services (business income) and one for some expenses incurred (travel). The client has paid both together so I can't separate?

You can use the Split feature to categorize the payments appropriately, Sarah206.

Here’s how you can do it:

1. Go to the Transactions menu.
2. Select the transaction you want to split.
3. Click Split from the Type column.
   
   
4. Select Percentage or Amount from the Split by dropdown.
5. For each split, select Business or Personal from the Type  dropdown.
6. If you select Business, select the link in the Category column and select the category you want the split to go into.
7. Enter the amount or percentage for each split.
8. When you're done, select Save.
   
   

You can refer to this article for the complete steps on how to organise your expenses and track different sources of income: Split transactions in QuickBooks Self-Employed.

For the invoice you sent, you needed to manually mark it as paid since it didn't update automatically. Here's how:

1. Go to Invoices.
2. Choose the transaction and click dropdown.
3. Click Mark as paid.
   
   

If you have additional questions about the proper categorization and tracking of your income and expenses, please leave a reply below. The Community is always here for you.