To connect to Teradata from PySpark, you can use the Teradata JDBC driver. First, download and install the Teradata JDBC driver on your machine. Then, in your PySpark code, you can use the pyspark.sql package to create a DataFrame from a Teradata table. You will need to provide the JDBC connection string, username, and password in the option parameter when reading the data. Additionally, make sure to set the driver class name to com.teradata.jdbc.TeraDriver when creating the connection.