EBS R12.2 supplier OAF page personalization to keep checkbox default value

Hello All,

I am trying to keep the check box clicked for one field in the Supplier OAF Page.

Tried using Initial value as Y and T, didnt work.

Kindly suggest.

Thanks,

Afzal.

Update:

Attached screen for reference.

Payables Manager>Suppliers>Inquiry><any supplier>Tax Details

Field: Allow Withholding Tax (need to checkbox clicked and non updatable)