If you've already created your Next Fiscal Year, then from what you're saying 2009 is seen as your Current Year (a year in which the last month occurred within 2009) and 2010 is your Next Year. In which case, to post a batch to your 2010 fiscal year, you would click the Next button in the toolbar, enter and post the batch there.

The fiscal year (eg 2009-) that displays is the year your fiscal year ends.

If the batch you want to post to fiscal 2010 is in your Edit Batches 2009- window, you can highlight the batch and use the Copy button to Move the batch to a Next Year, New Batch. After, click Next which will open the Edit Batches 2010- window, locate and post the batch to 2010.

Has your accountant provided you with fiscal 2009 journal entries that have been entered? If so, you'll want to run the Close Current Fiscal Year option located in the Maintenance menu. When this is done, fiscal 2010 will become the new Current Year and the Next button will disappear from the toolbar until it is needed again when it's time to open fiscal 2011.

Even if you Close Current Fiscal Year prior to receiving your accountant's year end journal entries, you are still able to post them using the Post to Prior function (up until you open the Next Year, or 2011).

To clarify, when you create the Next Year, normally you would not edit the Fiscal Calendar. Adagio Ledger automatically creates the next fiscal year calendar for you based on what the fiscal calendar is for the current year.