Are the T1198 forms mandatory to file even if I'm receiving a substantial return for 2018? Seems like it's mostly beneficial if taxes are owed and not if I have return?

I completed my 2018 income tax return with Turbotax online software and with all my information combined with merging what CRA has which are identical resulted in a substantial return. However my question is I have a T1198 slip but from what I can understand is that for the most part CRA only counts it if I owed taxes and not really beneficial for someone with a return. So do I have the option to choose not to use or file it, or is it mandatory?