Frequently asked questions I think I paid too much tax, how do I get it back? Staff at the Tax Expert Shop in Leeds will check your tax when you call in with your details. If they calculate that you need a refund they will complete all the necessary paperwork. Sub contractors will need to complete an SC60 to obtain any tax repayments. Can I estimate my income if I don't have all the information in my tax return? Can I complete my return after the January 31st deadline? How will I know if my tax affairs are being investigated? © Taxes. All rights reserved.