No — not in Texas. Texas has no state-issued Declaration of Domicile and no county recording process for one, so there is nothing for us to file on your behalf.
The declaration we provide for Texas is a private statement of your facts and present intent. Keep it with your personal records.
Notarizing it does not mean that Texas DPS, a tax agency, or an election office has approved your residence or domicile. It is simply for your own records.
This step is optional. You can complete your declaration here: https://app.savvynomad.io/home?tab=To-Do&step=DoD
For more on why the two states differ, see Why do Florida and Texas use different Declaration of Domicile processes?