To fill the tank or just leave it

Question, which Im sure has been covered but I couldnt find anything thru the search function..

I need to put my car away for winter storage.. Should I top the tank off or just leave it where its at...1/4 tank. It will be stored indoors during the winter which the heat will be turned on and off thru out the winter but I cant afford to heat the garage all year so I usually only turn the heat on if I need to work in the garage.

Thanks for you input