Does anyone know how & when to check on a mail-in ballot? (If it was received)
Can't help your state mine is marked 4 WWW.HOWIEHAWKINS.US ready to hand deliver to my county election office
You can check in PA right away, though they sent me an email saying it was received. Not sure how your state works.
Each state has different rules. Follow this link to see the rules.
[commoncause.org]
There is a note for Connecticut voters inside that article. Good luck.