45 bPaid Bool OptDftF PAID T if document has been paid in full. Invoices sales tax payments only. Does not exist if the invoice or tax payment has been partially paid. This sometimes also occurs in other transaction types. In these cases, we don't know if it has meaning or contains random uninitialized data.
Meaning depends on transaction type.
For example, on a Purchase Order main line, it's the total item count received so far. On other than a main line, it's the count of that item that has not yet been received. This will be true even in purchase orders where sales tax is not being paid if the item itself is taxable - which should be ignored. There can be problems when cash sales and invoices are entered out of sequence and the tax rate has subsequently been changed. If the transaction line in which this occurs has no mAmount field - the sales tax was not charged and this line should be ignored.