Payments

The Transactions tab is located in the upper-right hand corner of the Invoice, 222444.

It's possible that the tab is hidden. This can be the reason why you can't see it. To make it visible, click the Expand arrow or icon in the right-hand corner. You can also see this in the screenshot below. 

Let me also share this link for additional reference when preparing your year-end tasks: QuickBooks Desktop Year End Prep and Resources.

The Community is always here if you need anything else.