2020 File too large to transfer into 2021 Turbo Tax online software

"This import was unsuccessful.  The file you selected is too big.  Don't worry, if it's still too big, we'll help you enter manually".  

 

My computer crashed so I am using a new computer.  My 2020 returns are saved as PDF's on my computer.  

 

Any way to shorten this file to transfer successfully without having to enter manually?