im an LLC with one employee. a client owes me 3500$ and is 60 days overdue . can i sue in small claims

The llc can sue in small claims, but since it will need an attorney (unless you are admitted to practice law, you can't represent anyone other than yourself, so you can't represent the llc), it is possible that the small claims court will transfer the suit to another part of the court, especially if the defendant also hires an attorney.