Which version of OOS? That's entirely up to you.ok so i redownloaded the latest twrp.
what OOS file do I need ? from here? https://forum.xda-developers.com/t/oneplus-8t-rom-ota-oxygen-os-repo-of-oxygen-os-builds.4193183/
flash twrp in fastboot mode
install OOS zip
reboot recovery (should now be stock)
I'm getting off custom if at all possible this evening.
thank you for all your help.
Where from? The link you mentioned or the official OOS download site (as long as it's a full zip ~2.9 GB)