I have a CDL permit & got a DUI will I be Abel to get CDL latter& how long . I had a DUI also about 25-27 years ago

http://www.statutes.legis.state.tx.us/Docs/TN/htm/TN.522.htm - The law on the matter is here. It is section 522.081. Get an attorney immediately. You could be facing a lifetime disqualification. You are going to have to fight this second DWI case. You may have additional issues if refused the tests as well. It is possible to challenge a lifetime disqualification after it occurs, but additional information will be necessary at that time. I strongly suggest you contact an attorney.