Hmm, I get an 'Invalid file' error trying to upload a CSV.

Ruggb, use 'Open with' to open your TXT file in Excel. Tell it it's 'Comma delimited' and to 'Treat multiple delimiters as one', and you'll end up with 3 rows per entry:
Row 1 to Street address;
Row 2 City & State;
Row 3 Phone #

Does that get you towards where you want to be?