My daughter katie is 15 months old and her father hasn't been in her life since she was 3 weeks old and refuses to help in Texas is this a long enough time to consider that abandonment?

Have you filed for court ordered child support?

Have you looked at this that was posted at the top of this forum:

https://www.askmehelpdesk.com/family-law/child-abandonment-read-first-364259.html

Please review this and if you have any specific questions please ask.

Have you went to court to file for custody ? Have you filed for child support yet from the father.

This all effects things.