Sentence examples for when I told from inspiring English sources

The part "when I told" is correct and can be used in written English.
It is usually used to introduce a subordinate clause that explains the timing or circumstances of a main clause. Example: "When I told her about my promotion, she jumped up and hugged me." In this sentence, "when I told her about my promotion" is the subordinate clause, and "she jumped up and hugged me" is the main clause. The subordinate clause gives context to the main clause by explaining when the action in the main clause (her jumping up and hugging me) happened.