Q. I don't have all the figures needed to complete the tax credits renewal form and I'm worried I'll lose my tax credits as the deadline is 31 July. The main problem is, my income is as a musician and I don't know what my total income is until I receive the royalty statements.

A. Don't panic. You are required to return the tax credits renewals form by 31 July, or renew by phone, but you can submit estimated figures for 2011/12. When your self-employed accounts are ready you can submit the final figures and your tax credits award will be adjusted as necessary. As long as you submit final figures by 31 January 2013 you should not lose your tax credits.

Q. I'm an IT contractor currently working for a government department through my own company, for £300 per day. I've heard that all contractors will have to go on the department payroll. I don't want to be a wage-slave, so what should I do?

A. The government has announced that all senior appointments in government departments, such as executive positions, will have to be paid through payroll. This does not apply to other contractors. However, other government department contractors who are engaged for six months or more, and who are paid more than £220 per day, must when their contracts come up for renewal, or start afresh, include terms that allow the government department to seek formal assurance that income tax and NI obligations are being met. We can help you provide this assurance if it is requested.