Hi Ashleigh - that still is not giving me the ability to link a PO.

If I create a new bill, I get the tab open to link a PO. 

If I click Add to Bill from a PO, it will link the PO.

If I try to link a PO to a bill which has already been paid, this option does not exist for me.

The only way round I can find is to delete the paid bill, create a new one, link the PO and link the payment. That is not an acceptable option, for example we have reconciled December bills and now need to link a PO to one - we would have to undo the reconciliation, delete the bill, create the bill, link the PO & payment, and re-reconcile the month. That is a lot more work than is reasonable.

If the answer is that this is the only way round, then we will deal with it - but I'm being told to do things which simply aren't available as options ("click on the Add to bill" when there is no add to bill option, etc.).