Dealer would enter your NIC in FBR system and in case of filler system would provide info, in case of non filler system would say "not found".
Advance Tax is refundable to to filler only if filler has paid more tax than what he is claiming.
For example if I paid 1,25,000 tax for fiscal year 2013/2014 and I put a claim of 100,000 then i'll get full money back however if i paid ZERO tax and filled paper with zero tax then I will get ZERO money back.
Filling zero tax would bring me to FILLER category- getting tax money back depends how much one paid the tax.
I hope this helps