Disregarded LLC Their checkbox cannot elect a new tax status
A new status takes the IRS form that belongs to it, filed on purpose. A vendor box is not that form.

The dropdown feels like a filing
Accounting software and vendor portals both offer a list. Pick a life, save, move on. The save writes their database or your database. It does not write the IRS. An election is a form you sign and send, on a deadline, with a reason you could explain a year later. Two names are worth knowing, once, so you can go read the instructions rather than a tutorial on this site. Form 8832 is one door. Form 2553 is another. They are not interchangeable, and neither of them is a checkbox on a bank's website.
Ask whether you need one at all
Most owners who arrive with a vendor form do not need an election. They need the box that matches the life they already have. An election is a change, and a change wants a reason that survives October, when there is still time to look at the year and decide. Filing one because a marketplace preferred a different answer is a reason that does not survive a conversation.
If a change is real, the books have to be able to carry it. Equity, payroll setup, and the return have to be aimed at the same life before the form goes in the mail. That is a month of work, not a toggle. We will say so before anyone prints a form.
What to do with their box in the meantime
Answer it from the life you have, or leave it blank and tell them you are confirming. Do not check the answer you hope an election will create later. Their file will not wait for a form you have not filed, and a hopeful check is just a casual yes with extra steps.
Hope is not a filing
A marketplace that prefers a different answer is not a reason to elect one. An election is a change you could explain next October to a calm version of yourself. It has a form, a signature, and a deadline, and the instructions live on the IRS page for that form, not in a tutorial here. Form 8832 and Form 2553 are different doors. Knowing the names is enough to go read them. Checking a vendor box does not walk through either door. Their database updates. The IRS does not.
If a change is truly what you want, the books have to be able to carry it before the form goes in the mail. Equity, the way money leaves the company, and the return all have to aim at the same life. That is a month of ordinary work. It is not a toggle in a settings panel. We do not print one because a vendor asked tonight. Most people who arrive with a vendor form do not need that month. They need the box that matches the life already in force, or they need the box left blank while they confirm.
Leave their box on the life you have. If you have already checked the life you hope to elect later, save the confirmation and do not stack a second answer on it. Tell us what you wished the box could say. The reading will separate a real reason for an election from a reason that expires when the signup is done. A reason that expires is not a reason. The company you have is allowed to stay the company you have. Bring the wish in one line, and leave their screen alone until that reading is done. Form 2553 still waits on the IRS page with its own instructions.
Ask whether you need an election
Say what answer you wish the box could give.
You will be talking to the Steven Palmieri practice.