You can certainly add line breaks in Microsoft Access.
To add a line break in a text box, use Ctrl + Enter.
To add a line break using SQL, add the Chr
function:
INSERT Into MyTable(MyTextField)
SELECT "text text text text text text text" & Chr(13) & Chr(10) &
"text text text text text text text" & Chr(13) & Chr(10) &
" text text text text text text"
Chr(10)
is the line feed character. Chr(13)
is the carriage return character. Generally, in Windows, you make a new line by using a character return and a line feed (like you would in a type machine), but some operating systems use one (see this answer for more details).