I work from home 3 days out of 5. In filling out form T777, there is no option to indicate the number of hours that I work from a designated home office. Therefore, the amount included on line 22900 assumes that I work from home 100% of the time, which is inaccurate. Do I need to override the automatically calculated % listed in the line 48 of Form T777 to reflect the number of hours worked from home?