Just thinking, I had LO in June 2010, filled out my tax credit form with all the information, ie, when LO was born, earning for me and OH for 2009-2010. Been getting the payments monthly since then and will call to let them know my circumstances have changed when I go back to work in March this year. Was thinking, when I go back the new tax credit amount I get will be based on 2010-2011 (so OH full time wage and a few months full time for me and June 2010-March 2011 SMP. Someone has said that once I fill the form out and send it back to give them a call and tell them an estimation of my earnings for April 2011-April 2012 as will be different. Should I have done this when I filled the form out when I had my LO when I filled the form out?? Not sure if this makes sense? If its based on the year before obvisously your circumstances wont be the same as now?? But why would you fill the form out then call them to say actually none of its relative because im now on maternity leave and applying for tax credits which is why im fillin gout this form in the first place Obviously I filled out the form for earnings for the year before but I never called to say well im not on that now - as was on maternity leave? I dont want to be commiting tax fraud?!? Bit stressed now hope some of this makes sense?!