I've just received my last pay slip from work after leaving to become a SAHM. It included a few extra bits they owed me, holiday etc. The payment was £2400, but they've deducted about £180 National Insurance. Since April I've only earned £7000 in mat pay etc. Is this right, or should I get a rebate? I've not been taxed, it's only the NI and student loan that have been deducted.