Thanks for joining us here in the Community, Granny2.
I'd be glad to point you in the right direction concerning the down payment in your QuickBooks Desktop account.
In this situation I recommend reaching out to an accountant to be sure of the next steps. Moving the initial down payment from one year to another would require certain adjusting entries. An accountant would be to able to give you the best advice for this movement.
If you don't currently have an accountant, you can find one in your area specifically trained in QuickBooks by searching here: Find a ProAdvisor
Please feel free to reach back out if you need additional assistance with the entry after speaking with them. I'll be here to help in any way that I can.