If you're reconciling this account for the first time, compare each transaction in QuickBooks with what's recorded on the bank statement.
Exclude the entries that are not included in the reconciliation period, making sure the real-life balance matches. If you already added the 2015 items in the register, undo it first then exclude them in the Banking page.
To undo bank transactions:
Click the Banking tab.
Make sure the correct account that you need to work in is highlighted in blue at the top of the page.
Select the In QuickBooks tab, then place a check mark in the box(es) for the transactions you'd like to undo.
Click the Undo button that appears at the top of the list.
To exclude, follow the steps below:
Go to the For Review tab.
Check the box next to each transaction you want to exclude.
Select the Batch action drop-down menu, and then select Excludeselected.
Excluded transactions are moved to the Excluded tab, and won’t be added to QuickBooks or downloaded again.