Hi Trish L.
Having the right information showing on the T4's that you create is crucial when sending them off to the CRA and your employees. I'd be happy to help point you in the right direction for this.
The boxes that had to do with Covid-19 were only for the filings for 2020. I recommend reaching out to the CRA prior to filing to verify they haven't changed it to include the 2021 tax year as well. You can reach the CRA by following this link.
If you have any questions let us know and we'd be happy to help.