Fill out Forms

I am not an attorney and I live in Texas.
Is it legal for me, a tax preparer,to fill out immigration forms-for my customers- for a small fee?
Is it legal to advertise that I do immigration paperwork?
Some people say yes, no problem, others say I can not do it because then I am practicing law.
I have contacted 5 people including attorneys and they don't know.
I have search internet sites including the Texas State Bar Association.
Any information out there either internet sites, books, lawyer referral, phone numbers, etc is appreciated.
Thanks

I am not an attorney and I live in Texas.
Is it legal for me, a tax preparer,to fill out immigration forms-for my customers- for a small fee?
Is it legal to advertise that I do immigration paperwork?
Some people say yes, no problem, others say I can not do it because then I am practicing law.
I have contacted 5 people including attorneys and they don't know.
I have search internet sites including the Texas State Bar Association.
Any information out there either internet sites, books, lawyer referral, phone numbers, etc is appreciated.
Thanks

The Texas bar must have a section for "practicing without a license". Check it out for what you can do and what not.