In the upper right-hand corner of your Sage 50 Home Screen, there is a bell icon that is a list of messages Sage has sent you.  There should be one indicating an update is coming next week to correct the T4 box 57-60 problem when vacation pay is paid on every cheque.  I am not currently doing any semi-monthly payroll so I don't know if there is an issue specifically due to that payroll frequency.

How to report employment income during COVID-19 pay periods

For the tax year 2020, in addition to reporting employment income in Box 14 or Code 71, use new other information codes when reporting employment income and retroactive payments in the following periods:

• Code 57: Employment income – March 15 to May 9
• Code 58: Employment income – May 10 to July 4
• Code 59: Employment income – July 5 to August 29
• Code 60: Employment income – August 30 to September 26

Eligibility criteria for the CERB, CEWS, and CESB is based on employment income for a defined period. The new requirement means employers should report income and any retroactive payments made during these periods.

Example

If you are reporting employment income for the period of April 25 to May 8, payable on May 14, use code 58.

From the information on the CRA website, the T4 boxes are based on the pay date not the dates being paid - so it wouldn't necessarily have to be exactly 8 weeks worth of earnings.

Sorry that last reply sent before I finished replying:)

Hi Cathy Zhang, 

Thanks for reaching out, confirming that Richard S. Ridings's response here is accurate. Sage 50 CA licenses with the Payroll Sage Business Care plan add-on, as well as, our Sage Accountants Network members would have received an in product message (IPM) with the below details about the upcoming 2021.1.1 update next week.

2021.1.1 PRODUCT UPDATE FOR PAYROLL USERS

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Warm Regards, 
Erzsi