PRSI exemption for having a dependent child

While completing a Form 11 income tax return on the ROS offline revenue software program, I noticed that PRSI on self employed reduced to Nil when I entered a dependent child on the form. Income also included spouse's salary and there was no social welfare income. Has anyone any ideas on the basis for this or is it a flaw in the ROS software?

Thanks

Brian

If s/e income is yours and PAYE is spouse then I don't see why this should happen. Dependent child does not of itself alter s/e PRSI. Perhaps run the form again from scratch.

Thanks Graham,
removing the dependent child in ROS brings back the self employed PRSI. I'll try again from scratch.

Keep us posted, if it still does it let me run one and I'll see on my ROS application.