Hi again,
it depends, what kind of flows (Update types) are scheduled and not posted before your key date - you might need to use TBB1 (if this is e.g. repayment or interest payment) and/ or TPM18 (some find of realised P&L flow) - in both cases make sure you enter the correct parameters.
what you could also do is to share the relevant screenshot from TPM13, as quite often it is much easier to advise when you see exact case vs theoretical discussion.
Kind regards,
Renatas