Where do I enter my seed phrase
You was able to buy bitcoin but forget to process or input your seed phrase or private key on a wallet where it stores? I doubt that you are being honest here. If you want to seek attention do it on the right way. I cant believe that you yourself cant handle that as basic rule of investing on crypto keep your keys and know how to use it well. Funds can get lost along the way if you dont know how to do this kind of activity.
This was the same question I was about to ask, with every crypto wallet you are given some rules or guidelines when starting to open a new account, you are given instructions about how to write down recovery seed or back up your key, also you are told how to import the keys too.
How come OP is asking how to enter the seed phrase? I am guessing he fell for a scam himself, there was a time I came across people selling BTC wallet online some years ago, claiming the wallets are not empty, they have at least 1 BTC in them, I don't know how true this is but those days Bitcoin was hella cheap.
It is also possible that this person is just pretending to not know, maybe to lure people in somehow and used them? Funny thing is he could be hunted too, someone might try to take this seed from him claiming they can help him.