Send the Partial Invoice amount to GTA

Summary:

We have a requirement to send partial invoice amounts to GTA, where business users have the discretion to update the invoice amount before transmitting the file.

For example, if an invoice total is 30K, a user may choose to send 20K to GTA initially (e.g., if only 20K has been received from the customer), with the remaining 10K sent at a later date. However, it is not mandatory that the amount sent to GTA reflects the amount received—users may also choose to send a partial invoice amount even if no payment has yet been received.

Could you please advise how this requirement can be supported?