Recording an LP to a digital file

Welcome to the forum.
Is SONAR already loaded and set up and the UA already recognized by Windows and SONAR?
In SONAR, click Options>Audio and make sure that the UA is selected for both playback and recording.
Plug your turntable's RCA plugs into the RCA jacks of the UA.
In an audio track in Sonar, select the stereo input.
Turn the record level (input) control on the UA down.
Arm the audio track by clicking the R.
Start the record, preferably at a place with the highest volume level so you can set the record level so it doesn't clip at that point.
Adjust the input level control so the record meter never strays into the red for too long at the loudest part of the song.
Stop the record.
Click the Record button in SONAR's transport bar. Start the record.
You can choose to put all of the album side on one track or by stopping the record and SONAR after each song, rewinding SONAR, setting up another track to record each song on a seperate track.
Connect speakers to the UA's output jacks to hear what's going on.
 

Okay, RH, do you have your songs on different tracks or all on the same track?
If they're all on the same track, use the Split tool (looks like a pair of scissors) to split the long, long track into seperate clips within that track.
Once all the songs are segregated, drag them down to new tracks, each song on it's own track. Drag them to the beginning. Play the tracks to ensure none are clipping; lower the volume of a track so it doesn't clip.
I have a folder on my desktop caled audio files that I export any tracks I want to burn to CD to.
Click a track number until the clip in the track turns black, indicating it is selected.
Go to File>Export Audio and the Export dialog pops up with a lot of options. What You Hear is a preset that should work for you. If you plan on burning these songs to CD, use 44,100 Hz @ 16-bit.
Select a destination. In my case that is the Audio Files folder on my desktop.
Click OK and the file will be copied to your destination folder from which you can burn the song(s) to CD.
If you want to fade in or fade out a clip, hover the cursor over the upper right or left corner until the cursor becomes a triangle. Drag that triangle and it will insert a volume envelope, highlighted in gray.
It's also possible to edit out any pops and clicks in the file from the LP, but that's a long, tedious process. I believe there is software that claims to be able to do that automatically, but SONAR can't.

...Cheers, that was just the nudge I needed to get me started. Many thanks for the help.