The year start and end dates of a tax form can be manually changed from within the Clients Tax Form Details window.
Changing the start and end dates from the default values will generate the following warnings when checking for SBR errors in the tax form:
Warning in Main form [*] : The tax period start date has changed to [XX/0X/20XX].
Warning in Main form [*] : The tax period end date has changed to [XX/0X/20XX].
When performing the year end rollover of all clients, a rollover report will generate with a list of tax forms that have alternate start and end dates. You will find a copy of this report in the Hsoft\Doc\RolloverLog.HT20XX.txt (20XX being the date the rollover was performed).