Some taxes have periodic returns and an annual return on top, such as quarterly VAT returns with a yearly summary return.
Steps
Open the obligation, scroll to Filing periodicity and select the pencil on the periodicity.
Under Consolidated annual return, select This periodicity has a consolidated annual return.
Set its due date: relative to the end of the year, such as three months after, or a fixed date. The calculation examples show the resulting dates.
Select Save. Loctax adds an annual period next to the periodic ones, with its own due date.
If the annual filing is a different return altogether, add it as a separate obligation instead.