Can anyone give me ideas for towing turbo?

i bought this truck used and the guy gave me paper work what he did to it.....but the paper got lost(wife probably cleaned the truck and in the trash).

2012 2500 6.7 68RFE
90 over injectors , efi live, stainless diesel said my turbo is probably 468 2nd gen swap, 625 studs, heavy valve springs, bd brake

i tow 20000 - 30000 gvw up steep by not very long hills.

Also it’s a daily driver.