Ein number question ?

Why don't you register your LLC as a foreign entity in Maryland, maintain the Texas presence, and just keep everything intact?

The best thing you need to do is find a lawyer who does this exact thing, they do exist and they can do workarounds that you and others can't think of.

 

Well I don’t know if you need more than an office address for a presence but it can’t be a ups address. one reason why you need to get a lawyer to represent you for this, he/she can provide a legal source for a presence. I bought a company that I used this scheme to cover legal matters for 14 months until I moved all the assets into one of my companies, I sold off the authority with the llc intact to a domestic (in state) company, this all made it really simple. They are still using the authority.

one reason why I avoid llcs is the transferring them can be a pia. I like c corps because they are simple to move.

 

They don’t let you change your ein number. You could add one if you were previously using a ssn.

I really don’t see why you can’t just register your business in MD without changing anything. Imo, the ein stays with the company.

Then just update details on your MCS-150.

 

MD has a load more taxes than TX, so I don't know why OP thinks this is a good idea?

Have you talked to CPA or accountant about what will literally cost you thousands per year?