Changing hours at work

[onemoresmartie]

I have got a new job in work. I currently work 20 hours but my new role is only 18.5 hours....will this impact my tax credits massively? I am a single parent

As long as you're still over 16 hours a week then it won't affect your tax credits. However they probably won't increase either until after the summer's renewal, but ring up to update your details anyway just in case :)