Welcome to the forum and congratulations on making it to the 1 year mark! That's a terrific achievement, especially for a working mom. You put in a lot of hard work with the pump over the last 12 months!
A lot of working moms wean from pumping at around a year, and just continue to nurse on demand when with their babies. That way they get to keep the enjoyable aspects of breastfeeding without worrying about supplying lots and lots of milk.
If you want to get your supply up, then forget the tinctures and supplements. The best way to go about it is to increase the frequency and completeness of milk removal from the breast, either by nursing more or by pumping more, and using a really good pump that is in tip-top shape. It's a lot of work at 12 months! But still doable.
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"