Can you change the statement ending date after you have completed a reconciliation? I forgot to change from 2021 to 2020? Does it make a huge difference ?

Hi trish-davidson44,

Welcome to Community!  When reconciling your account, things can happen that require attention.  With QuickBooks Online, the best way to make any corrections to an account after it's been reconciled, is to undo it.  I'd be happy to advise!

Although you can manually unreconcile transactions, when errors occur, this isn't recommended.  Any changes made can unbalance your accounts.  To completely undo it, I'd recommend reaching out to your Accountant.  They're able to undo the reconciliation for you.  Once that's been completed, you'll be able to start the process again and enter the desired date range in accordance to your statement.  If you don't have an Accountant, we'll help you find one here.

If you have any other questions, please feel free to reach back out.  We're glad to help!