How do I pull up my 2019 an my 2020 mileage for my taxes bc they say they need my mileage for both years

I can not answer for QBSE, but for your knowledge going forward
the IRS requires a mileage log which contains at the minimum
the starting mileage for the year (1/1)
the date, starting odometer, the to location, and the ending mileage for that trip, and the reason
do the above for each trip
then the ending mileage for the year (12/31)

Good luck