Hi there, @KayleeT.
I appreciate the detailed information that you shared regarding your concern with making corrections for overstated sales revenue from duplicate payments. I'd like to make sure that you can keep your records accurate.
You can void one of the payments and put a memo on it stating that it was a duplicate. This way, QuickBooks will create an adjusting entry for the current year. Creating a Journal Entry will also work in this case since these transactions are from the prior year.
However, to ensure the best course of action for your business, I'd recommend reaching out to your accountant. They'll be able to provide you the steps to sort this matter out.
You might also check out our live ProAdvisors from this site: Find an accountant or bookkeeper who loves your business as much as you do.
Keep me posted if there's anything else that you need. I'll be right here to assist you further. Take care!
