When downloading from HMRC, you will notice when that messages downloaded from HMRC have an Effective Date.
This is the date the message should be actioned from.
As you can see on the example below, the Effective Date is highlighted, and the date showing is 11-02-2023.
This means the Tax Code should not be changed for a payroll run before that date.
To prevent errors, Kashflow will check if the next payroll run includes this date when trying to apply
In the example above, if we tried to apply this message before the payroll run which includes the effective date of 11-02-2023, Kashflow will return the following message:
This is expected behaviour, the system is preventing the tax code from being processed too soon