To manage lumpsum tax, there is a setting available in 'General' category
of Vat Return. You should mark 'Yes' against the setting 'Lumpsum VAT
System required'.
You should fill the lumpsum tax amount in the input information for Vat
returns window as shown below:
If you want to show the amount of sales against this lumpsum tax, you
should mark the relevant Vat Class as shown below:
If you do not mark the above said Vat Class and enter only lumpsum tax
amount, information w.r.t. Output Vat only shall be printed.
Note: In case of lunpsum tax, the words 'LUMPSUM TAX' will be printed at
the top of Form VAT-15. If you are using the above mentioned VAT class,
sales and tax amount will be shown in worksheet in the row marked
'Others (Specify)'.