Recording a payment made to TAN account for import duties

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Hi

Looking for some help to record this transaction correctly:

Made a payment from our current account to our TAN account with Revenue for import duty charges.  

I want to self account for the VAT due on these import charges.  If I put it through bank payments, it will not allow me to us tax code T39/T40.  I want this amount to be included in the figure for the postponed Vat return.  How are other Irish companies recording this transaction?

Thanking you for your help.