To do this task
Go to the File menu, choose Utilities, choose Export, and then click Lists to .IIF
In the Export window, choose Budgets.
Enter a filename, such as budget.iif.
The filename must have an .iif extension.
Open the budget.iif file with a spreadsheet editor, such as
Change the year in the column "STARTDATE."
Save the changes.
In QuickBooks, go to the File menu, choose Utilities, choose Import, and then click
Select the budget.iif file in which you changed the date.
a new budget from previous data
Go to the Company menu, choose Planning and Budgeting, and then click Set Up
Click Create New Budget.
Select the year and type of the new budget. Except for the year, be sure
that the criteria matches the budget that you want to copy.
Select Create budget from previous year's actual data.
QuickBooks automatically enters the monthly totals from last year for each
account in the budget.