Collection Taylor & Francis Journals Complete used to be updated from an A-Z file supplied by T&F. 
However, T&F stopped supplying an A-Z title list about two years ago due to technical difficulties and it seems like they won't supply it in the future. 

We did not delete this collection from SFX/Alma due to customer's requests to leave it. But we are not able to update it. 
The Title List Taylor & Francis Current Content Access at https://www.tandfonline.com/page/title-lists
is available in collection Taylor & Francis Current Content Access.