Is it permissible to claim zakat (charity) in tax return?

Sometimes we get a receipt for whatever donation we do. It can be reimbursed when filing our tax returns. If I give zakat and get a receipt and claim it in the tax return, is it OK to do so? Also can i use the claimed Zakat for my personal use? For example: I am due to pay Zakat of $500. Now if i claim this $500 in my tax return, i will get them reimbursed. Now lets say my total tax refund was $800. Now out of this $800, i know that $500 are the one that i claimed for Zakat. Now if i want to buy something worth $800 for myself, lets say TV or Refrigerator, can i do that?