You use the Delete Cost Budget Entries batch job to cancel cost budget entries from the cost budget register.
To prevent any gaps in the cost budget entries and cost register entries, you can't delete a single entry or a batch of entries in the middle of the list of register entries.
To delete a cost budget entry
Select Search (Alt+Q) 
in the upper-right corner, enter Delete Cost Budget Entries, and then choose the related link.
The To Register No. field contains the last register entry number and can't be changed.
You can use the From Register No. field to select a register entry number from which the deletion should begin.
Choose the OK button to delete the selected cost budget entries.
Note
To avoid an accidental deletion of cost budget entries, you can close register entries by marking the lines as Closed in the Closed field on the Cost Budget Registers page.
Related information
Accounting for Costs
Creating Cost Budgets
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