The method that you use depends on the way that you track and pay your tax:
The Agency details window displays.
QuickBooks locates all open transactions for the previous year and includes them in the current accounting period.
When you switch from cash to accrual accounting, tax on all unpaid sales and purchases becomes due. You must report and pay this tax when you file your tax return for the current period. See Calculate new tax liability.
If you have unpaid transactions that you wrote off as bad debts, adjust your tax return manually to remove these transactions.