And follow up to my above comments. Note, this is a Shopify store. I am not manually invoicing customers, or tracking inventory, or sending receipts. Shopify has these features and does them automatically. I simply need to be able to record income that comes into my bank account under a project. How is this accomplished?
I appreciate your time getting back here, sc_biz.
Let me share some additional info about your situation.
The information we receive is all dependent on what your Financial Institution shares with us. You may see the Customer/Project drop-down menu on some transactions.
If the option is not available on the transaction you want to add, you can use the Vendor/Customer drop-down list. Then, choose the project you've created in QuickBooks.
Here's a sample screenshot for a visual reference:

To help categorize and match your downloaded transactions, you can watch a video tutorial in this article: Categorize and match online bank transactions in QuickBooks Online.
You can also visit our general help topics page to search for related help articles, Community discussions, video tutorials and more.
Please don't hesitate to leave a reply below if you have any additional questions or other concerns. We're always available to help. Take care and stay safe.