To see a YoY comparison for a particular month in your balance sheet and P&L, use the Comparative Monthly and Year To Date - Profit and Loss & Balance Sheet LiveFlow Template
To replace the data in the template with your own data, follow the instructions in this guide
In the P&L by YTD tab, select the month in cell B13 for which you want to see the YoY comparison for i.e select May 2023 to see a side-by-side comparison of the data from May 2022.
In the Balance Sheet by YTD tab, select the month in cell B3 for which you want to see the YoY comparison for. The previous year's data will appear in the cell adjacent to each account for the month you select