If you are claiming the ‘Temporary Wage Subsidy for Employers” then the source remittance will automatically reduce the payment to CRA for the eligible amount and post it to the GL account setup in company settings -> Payroll->Employer ->Temporary Wage Subsidy Revenue Account.
First create a GL account for the subsidy income.Then add that GL account as below.
Then when submitting the payroll deductions the subsidy will be calculated and posted to this GL account.
The subsidy amount will be posted to the Subsidy income account