We’re in the process of making some changes that might delay the calculation of the final withholding rate. We are likely setting it up to defer tax information validation until you’ve requested a payout (or potentially first item sold). At that time validation will commence and everything will update accordingly.
If you’d like us to process it ahead of time we may have a way you to manually request it. We will need to finalize these changes first though.
If a payout does get paid with the incorrect withholding rate it can be corrected, but it must be done so as soon as you notice as it may be locked in if you wait past when it is filed with the IRS.