Bryan, "tu m'as quitté" is always "é" and "à la maison" is always "à".
But, seriously, the system has a solution for you. Scroll down to the bottom of the page and click on "outil d'accentuation automatique". Put your text into the space, then click on "accentuer ce texte" and the system will do the job automatically.
I'd like to just mention this very practical and easy to use typing help to put the accents on the letters in French texts when using an English keyboard.
You just type your text in the space and click on the accented letters when necessary; then copy and paste.
"Grand cadre" is to get a larger page.