S a tax paid for wrong a.y.

Dear all, Tax return prepayer of my friend filed friend's ITR for A Y 2012-13. S. A. calculated of Rs 10038 and paid by Tax preparer himself, reimbursed by my friend and filed the return. Now IT dashboard shows demand of Rs 12210 incl interest for A Y 2012-13. When form 26 AS was checked, it is found that said Rs. 10038 was wrongly paid as Advance tax (100) and that too for wrong AY 2013-14. In A. Y 2013-14 there was no taxable income and hence my friend didnt file ITR. IT dashboard shows rectification rights with CPC. I wish to know whether he will get credit for AY 2012-13? What is the solution? Kindly suggest. Regards Suraj