DH works full time and i currently work 10 hours. We get £250 tax credits per month. I have been offered another job at 15 hours per week which means i will loose tax credits. The extra hours is only guarnateed for a year but potentially longer. If i took on job for a year what way do my tax credits work the following year as financially we couldnt afford not to get them when im not working the extra 15 hours. Thanks