The O schedule contains questions that determine if payments are due in installments. Key cells include
E128 Large last period (ignoring earlier periods)?
and
E131 Large this period (ignoring prior period)
, which, if both set to
Yes
, will trigger quarterly payments. Cells
E132 'Large for instalment calculations?'
or
E144 'Very large for instalment calculations?'
will calculate as
Yes
if the company is classified as large or very large, respectively. Check current and prior year returns if these settings are incorrect.