Unfortunately, the S3 itself from CRA only contains 2 lines. Having more than 2 entries in this section must be rare in the eyes of CRA.
I ran some tests in TurboTax Online (rather than desktop/download). In TurboTax Online, there is no limit for number of entries for the S3.
Since TurboTax Online is free to try (pay only when you're ready to file), take it for a test drive here www.turbotax.ca.
