How do I access my 2021 tax reports, I’m super late on doing them and can’t seem to access those reports

You should be able to view those through Taxes.  On the Sales Tax tab select Filings.  I usually select ALL from the drop down menu but I think you can select that I can see UNPAID or Next to File etc.  

Scroll down to the appropriate timeframe (for instance ours is quarterly) and on the right side of the table is VIEW SUMMARY and down arrow next to it.  Click on the down arrow to display the options like VIEW HST DETAIL etc.  This should give you the report you are trying to access.