Why is it not letting me edit my Maine state return? Says it's waiting for new law updates? Anyone else?

Most Maine state forms are currently projected to be available on January 31, 2024, subject to change,

To find out when a specific form is expected to be available, use this tool. Select your TurboTax product, 1040 Individual, and US Federal or the appropriate state from the drop-down menus. Enter the form or schedule name in the search box.

Why is it like that this year? I've never had to wait for forms ever

Many forms, particularly state forms for several states, are still in process; many are currently projected to be available on January 31, 2024, subject to change. 

This is primarily due to late changes in the tax laws from Congress and state legislatures, and then to policies, regulations, and forms as developed by the IRS and the state tax agencies. TurboTax and other software providers then have to reprogram and test their products.