VinylStudio can look up track listings for many LPs over the Internet. To do this, click on the Split Tracks tab, select the album from the dropdown list if necessary and then click Lookup Track Listing. This will popup the following window:

With luck, you will be able to retrieve a full track listing from one or other of the available databases by clicking Lookup. If so, select the best match and then click OK.
If you can't find a match, try simplifying the artist or album title - just a few keywords will often do. Alternatively, you can try a different database. Music Brainz seems to have the best balance between coverage and 'noise', but the other databases are worth a try for more obscure material.
Because some entries are for CDs rather than vinyl albums, track listings are sometimes in the wrong order or may contain extra tracks. You can edit an incorrect or incomplete listing as follows:
You can also edit the track listing in the Split Tracks window. Doing it there has the advantage that you can Undo
(Ctrl+Z) and Redo
(Ctrl+Y) any changes you make.
If the retrieved listing does not contain track times (or if they are inaccurate), it is worth typing them in if you have them to hand, especially for classical music. VinylStudio will then position trackbreak markers for you in roughly the right places. Please note that the Amazon databases do not contain track times and Discogs only has themn for certain albums.