While using "TurboTax Standard 2017", how do I spilt income from T5008 between myself and my spouse? Your Software does not have % option for this like T3 and T5.

You're correct. Our online editions provide a method to enter a percentage of ownership but our CD/download editions do not.

You'll have to manually calculate your percentage of each amount and enter it yourself if you're using the CD/download edition.

So, Do I have to delete it as auto filled and then enter it once in my and once in my spouse's slips with % modified amounts? Please confirm. I want to be sure that I have to delete the one auto filled. An alternative could be that I edit (not delete) the auto filed one for % corrected figures. and then enter a new one for my spouse's slips.

You don't have to delete the slip that was auto-filled, you can just modify the amounts if you'd prefer.