In vehicle expenses, need a number for "Total lease charges deducted in previous year",how can I find this one? I use turbotax every year. Thanks.

You can look at your previous year's tax return. 

To get a PDF copy of your 2021 return, you can login to 2022 and scroll all the way down to the bottom. There, click “Access your filed tax returns” and you will see a list of filed returns.

If you want to go into the actual return, you can login to 2021 here: https://ww1.2021.turbotaxonline.intuit.ca/signin?_swlg=en