How much of the tax refund will the trustee take as part of the bankruptcy estate if I filed February 19th 2014?

I've already filed on my own and went to the creditors meeting, but the portion I don't understand is the 2014 tax refund. How much of the tax refund will the trustee take as part of the bankruptcy estate if I filed February 19th 2014? Is it divided into 12 months then 2 months worth or is it 50 days? Someone said to me that the Estate gets it all. I hardly pay taxes because I don't make a lot of money. I do however receive a lot of credits EIC for low income and child tax credit. How is this configured for AZ? I am a single mother and student. I depend heavily every year on those credits to take care of things like car maintenance and school clothes, shoes, household items like sheets, pillows, towels, blankets. So this is a huge deal for me. I begin to make a prioritized list in October of what will be purchased with that money in January and February. Now I'm worried.