Tax Due Date Calendar 2025-26. The due date for the cit return is the end of february or, if filled electronically, 15 march following the calendar year. The contents of this gst return due date calendar have been prepared on the basis of relevant provisions and as per the information existing at the.

40% on income between £50,271 and £125,139. As a tax deductor (someone who withholds tds from.