is it easy to remove the logo?

Just get the small seam ripper. I removed 6 logos in a few minutes. Would've been faster but one of them was particularly troublesome. A tiny wrinkle of material was sewn into the logo material and had to be very careful not to damage the shirt threads. The seam ripper is less than 4 bucks.https://www.amazon.com/Dritz-608-Seam-Ripper-Small/dp/B005574EBO/ref=sr_1_17?s=arts-crafts&ie=UTF8&qid=1480374254&sr=1-17&keywords=seam+ripper

Do these run big ? I’m a 5xl in some t shirts , I hear carhartt is durable but do they stretch ? How is the sizing ?

No, they run true to sizes listed. These shirts are the absolute best a shirt can be. I love them, and have been wearing them for at least 12 years. I now own at least 30 of them, and they are the only shirt I wear unless my wife says I need something different for some occasion. I have the long sleeve Henley’s for our Wisconsin winters and the short sleeves for our summers. In my opinion they are an 11 out of 10! Enjoy yours!

I want to keep this but dont know how to cancel the return.

It is difficult contacting amazon, but i'm not sure if you have to do anything? well, i just found this: Search Results Featured snippet from the web To cancel a return: Go to Online Returns Center. Click Manage returns. Click View Return and Refund Status next to the return authorization for the return you want to cancel. Click Cancel this return. A text box will pop-up to confirm you want to cancel the return. Click Cancel this return.