Also if you currently have VTSMX with $3K or over, they allow you to convert it to VTSAX and start paying lower ER.
I did just that.
Did you have to call? I am not finding this option on the site.
Also: THX OP! I might never have been privy to this tidbit.
You should have received an email from them with option to convert.
At least that is what I got and was able to convert it instantly.
You can call them and they will do it for you or just wait and they will take care of it themselves within a year.
I would not wait for them. Do it and start paying less ER.